Acute Valvular Dysfunction

1. Clinical Overview

Summary

Acute valvular dysfunction represents sudden failure or severe deterioration of heart valve function, causing either regurgitation (backward flow) or stenosis (obstruction), leading to rapid hemodynamic decompensation. This is a true cardiovascular emergency with mortality rates of 20-50% without urgent intervention. [1,2] The most common presentations are acute mitral regurgitation (MR) from papillary muscle rupture following myocardial infarction (occurring 2-7 days post-MI in 1-3% of cases) and acute aortic regurgitation (AR) from endocarditis or aortic dissection. [3,4] Unlike chronic valve disease where the heart has months to years to develop compensatory mechanisms, acute valvular dysfunction allows no time for adaptation—the sudden volume or pressure overload leads to immediate pulmonary edema, cardiogenic shock, and potentially death within hours if untreated. [1,2]

The hallmark clinical presentation is a new murmur (may be soft despite severe dysfunction), acute heart failure symptoms (severe dyspnea, orthopnea, pulmonary edema), and hemodynamic instability. [5] Diagnosis relies on urgent echocardiography (transthoracic followed by transesophageal if needed) to confirm the valve involved, mechanism of dysfunction, and severity. [1,2] Management requires simultaneous resuscitation (oxygen, diuretics, vasopressor/inotropic support), treatment of the underlying cause (antibiotics for endocarditis, coronary intervention for MI), and urgent cardiac surgical consultation—most cases of severe acute valvular dysfunction require emergency or urgent surgery for survival. [1,2,6]

Key Facts

• Definition: Sudden onset or rapid worsening of valve dysfunction causing hemodynamic compromise
• Incidence: Acute severe MR post-MI: 1-3%; Acute severe AR in endocarditis: 10-30% [3,4]
• Mortality: 20-50% untreated; 10-30% with optimal treatment including surgery [1,2]
• Peak age: Varies by etiology (MI-related: 60-70 years; endocarditis: any age)
• Critical feature: New murmur + acute heart failure + hemodynamic instability
• Key investigation: Urgent echocardiography (TTE/TEE) [1,2]
• First-line treatment: Medical stabilization + urgent/emergent cardiac surgery [1,2,6]

Clinical Pearls

"Acute severe MR may have a soft murmur" — In acute severe mitral regurgitation, the murmur is often softer and shorter than chronic MR because of rapid equalization of LA and LV pressures. Don't rely on murmur intensity to gauge severity. [5]

"Post-MI day 2-7: think papillary muscle rupture" — Papillary muscle rupture typically occurs 2-7 days after MI (peak day 3-5), presenting with sudden clinical deterioration and new holosystolic murmur. Posteromedial papillary muscle (supplied by PDA) is affected in 80% of cases. [3,7]

"Acute AR: wide pulse pressure, short diastolic murmur" — Unlike chronic AR, acute severe AR presents with wide pulse pressure (> 60 mmHg), tachycardia, short early diastolic murmur (LV diastolic pressure rises quickly to equal aortic pressure), and premature mitral valve closure on echo. [1,2]

"TEE is superior to TTE for endocarditis" — Transesophageal echocardiography has 90-100% sensitivity for detecting vegetations, abscess formation, and valve perforation versus 50-70% for TTE. TEE should be performed urgently in all suspected cases. [8]

"IABP contraindicated in acute AR" — Intra-aortic balloon pump counterpulsation is absolutely contraindicated in significant aortic regurgitation as it worsens regurgitant volume. Use alternative mechanical support if needed. [9]

Why This Matters Clinically

Acute valvular dysfunction is a medical emergency requiring immediate recognition and treatment. Early identification (high index of suspicion in at-risk patients), rapid diagnostic confirmation (urgent echo), aggressive medical stabilization, and timely surgical intervention are the cornerstones of survival. Delays in diagnosis or surgery are associated with significantly increased mortality. [1,2,6] This is a core topic for MRCP, MRCS, and emergency medicine examinations.

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2. Epidemiology

Incidence & Prevalence

Acute Mitral Regurgitation:

• Post-MI papillary muscle rupture: 1-3% of STEMI cases [3]
• Chordae tendineae rupture (spontaneous): 0.5-1% of all MR cases [7]
• Infective endocarditis causing MR: 30-40% of native valve IE [4]

Acute Aortic Regurgitation:

• Endocarditis: 10-30% develop acute severe AR [4]
• Aortic dissection: 40-50% of Type A dissections have significant AR [10]
• Prosthetic valve thrombosis: 0.1-6% patient-years (mechanical valves) [11]

Trends:

• Decreasing incidence of post-MI papillary muscle rupture with improved MI management (thrombolysis, PCI)
• Stable incidence of endocarditis-related acute valve dysfunction
• Increasing recognition with widespread availability of echocardiography

Demographics

Risk Factors

Non-Modifiable:

• Advanced age (increased MI risk, degenerative changes)
• Male sex
• Previous valve disease (even if mild)
• Congenital valve abnormalities (bicuspid aortic valve)
• Connective tissue disorders (Marfan, Ehlers-Danlos)

Modifiable:

Common Etiologies by Valve

Acute Mitral Regurgitation:

Acute Aortic Regurgitation:

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3. Pathophysiology

Acute vs. Chronic Valvular Dysfunction: The Critical Difference

The fundamental difference between acute and chronic valve dysfunction is time for compensation:

Chronic Valve Disease (months to years):

• Gradual volume/pressure overload
• Compensatory mechanisms: ventricular dilatation, hypertrophy, increased preload, Frank-Starling mechanism
• Symptoms develop slowly; may be asymptomatic for years
• Lower mortality with medical management

Acute Valve Dysfunction (hours to days):

• Sudden volume/pressure overload
• No time for compensation
• Normal-sized, non-compliant chambers unable to handle acute hemodynamic changes
• Immediate pulmonary edema, cardiogenic shock
• High mortality without urgent intervention [1,2]

Hemodynamic Consequences by Type

Acute Severe Mitral Regurgitation

Step 1: Acute Regurgitant Volume

• Sudden incompetence of mitral valve (papillary muscle rupture, chordal rupture, leaflet perforation)
• 50-70% of LV stroke volume regurgitates into normal-sized, non-compliant left atrium [5]
• Result: Massive increase in LA pressure (can reach 40-60 mmHg acutely)

Step 2: Pulmonary Venous Hypertension

• Markedly elevated LA pressure transmitted directly to pulmonary veins
• Normal LA cannot dilate acutely to accommodate regurgitant volume
• Result: Flash pulmonary edema (within minutes to hours)

Step 3: Reduced Forward Cardiac Output

• Effective forward stroke volume severely reduced (only 30-50% of total SV)
• LV cannot dilate acutely to increase preload and compensate
• Result: Hypotension, cardiogenic shock, end-organ hypoperfusion

Step 4: Right Heart Failure

• Pulmonary hypertension increases RV afterload
• RV failure develops rapidly if pulmonary pressures > 60 mmHg systolic
• Result: Systemic venous congestion, further reduction in cardiac output

Clinical Pearl: Murmur intensity does NOT correlate with severity in acute MR—rapid LA-LV pressure equalization reduces the gradient and softens the murmur. [5]

Acute Severe Aortic Regurgitation

Step 1: Acute Regurgitant Volume

• Sudden AR (endocarditis, dissection) causes regurgitation of 40-60% of stroke volume into LV
• Normal-sized, non-dilated LV with limited compliance
• Result: Rapid rise in LV end-diastolic pressure (can reach 40-50 mmHg)

Step 2: Premature Mitral Valve Closure

• Elevated LV diastolic pressure exceeds LA pressure in mid-to-late diastole
• Mitral valve closes prematurely (visible on echocardiography) [1,2]
• Result: Further reduction in forward stroke volume, incomplete LV filling

Step 3: Reduced Coronary Perfusion

• Coronary perfusion occurs in diastole
• Rapid equalization of aortic and LV diastolic pressures reduces coronary perfusion pressure
• Result: Myocardial ischemia, further LV dysfunction (vicious cycle)

Step 4: Cardiogenic Shock

• Severely reduced forward cardiac output
• Reflex tachycardia (shortens diastolic time, worsens regurgitation)
• Result: Shock, pulmonary edema, death without intervention

Key Difference from Chronic AR:

• Pulse pressure: Wide (> 60 mmHg) but less dramatic than chronic AR
• Diastolic murmur: Short, early diastolic (rapid pressure equalization)
• Peripheral signs: Absent (no chronic arterial remodeling) [1,2]

Classification by Mechanism

Anatomical Considerations

Papillary Muscle Anatomy and Rupture:

• Posteromedial papillary muscle: Single blood supply (PDA), ruptures in 80% of cases (inferior MI)
• Anterolateral papillary muscle: Dual blood supply (LAD + LCx), ruptures in 20% of cases (large anterior MI)
• Complete rupture: Catastrophic, immediate pulmonary edema, shock; requires emergency surgery
• Partial rupture: May have initial stability, deteriorates within hours to days [3,7]

Chordae Tendineae:

• Anterior leaflet: 9-12 chordae; posterior leaflet: 6-9 chordae
• Rupture of primary (marginal) chordae → flail leaflet → severe eccentric MR
• Rupture of secondary chordae → less severe, may be tolerated acutely

Aortic Valve and Root:

• Aortic root dilatation in dissection → loss of leaflet coaptation
• Endocarditis: preferentially affects non-coronary cusp (50%), then right coronary cusp (30%)
• Perforation of leaflet → acute severe AR with eccentric jet

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4. Clinical Presentation

Symptoms: The Patient's Story

Cardinal Symptoms:

• Severe dyspnea (80-90%): Sudden onset, rapidly progressive, orthopnea, paroxysmal nocturnal dyspnea
• Chest pain (30-50%): If MI-related or coronary hypoperfusion in acute AR
• Palpitations (40-50%): Compensatory tachycardia, arrhythmias
• Syncope/presyncope (20-30%): Severe reduction in cardiac output, especially acute AR
• Fatigue, weakness (70-80%): Profound, acute onset

Presentation by Etiology:

Post-MI Papillary Muscle Rupture

• Timing: Day 2-7 post-MI (peak day 3-5) [3,7]
• Preceding event: Often smaller MI (single-vessel disease), incomplete revascularization
• Onset: Sudden clinical deterioration from stable or improving status
• Symptoms: Flash pulmonary edema, severe dyspnea, hypotension, shock
• History: Recent MI (often inferior), ongoing chest pain may be absent

Infective Endocarditis

• Onset: Subacute to acute (hours to days of worsening)
• Symptoms: Fever, chills, night sweats, dyspnea, heart failure symptoms
• History: Risk factors (IVDU, prosthetic valve, dental procedure, recent bacteremia)
• Associated: Embolic phenomena (stroke, splinter hemorrhages, Osler's nodes), petechiae [4,8]

Aortic Dissection

• Onset: Sudden (within minutes)
• Symptoms: Severe tearing chest/back pain, dyspnea, syncope
• History: Hypertension, Marfan syndrome, bicuspid aortic valve, recent heavy lifting
• Associated: Pulse deficits, neurological symptoms, acute limb ischemia [10]

Spontaneous Chordae Rupture

• Onset: Sudden (may occur during exertion, Valsalva, or at rest)
• Symptoms: Acute dyspnea, palpitations, may have brief chest discomfort
• History: Known MVP or mitral valve disease, middle-aged, may be asymptomatic before event
• Associated: No fever, no systemic symptoms

Trauma

• Onset: Immediate or within hours
• Symptoms: Dyspnea, chest pain, hemodynamic instability
• History: Blunt chest trauma (MVA, fall, assault), penetrating trauma
• Associated: Rib fractures, pulmonary contusion, other injuries

Signs: What You See & Hear

Vital Signs:

General Appearance:

• Acute distress: Sitting upright, leaning forward, using accessory muscles
• Diaphoresis: Profuse sweating (shock, sympathetic activation)
• Cyanosis: Central (if severe hypoxemia), peripheral (if shock)
• Altered mental status: Confusion, agitation (if severe hypotension, hypoxemia)

Cardiovascular Examination:

Acute Mitral Regurgitation

Why the murmur is soft in acute severe MR: Rapid equalization of LA and LV pressures → reduced pressure gradient → softer, shorter murmur than chronic MR. [5]

Acute Aortic Regurgitation

Key Differentiating Signs from Chronic AR: Short murmur, absent peripheral signs, less dramatic pulse pressure. [1,2]

Signs of Specific Etiologies

Endocarditis:

• Fever: 80-90% (may be low-grade or absent with prior antibiotics) [4,8]
• Osler's nodes: Painful nodules on finger/toe pads (10-20%)
• Janeway lesions: Painless hemorrhagic macules on palms/soles (5-10%)
• Splinter hemorrhages: Subungual linear hemorrhages (10-20%)
• Roth spots: Retinal hemorrhages with pale centers (less than 5%)
• Splenomegaly: 20-40% (if subacute)
• Petechiae: Conjunctival, palatal (20-30%)
• Embolic phenomena: Stroke, limb ischemia, splenic infarct (20-40%)

Red Flags — Immediate Life-Threatening Features

[!CAUTION] Red Flags Requiring Immediate Escalation:

• Cardiogenic shock (SBP less than 90 mmHg + end-organ hypoperfusion) — Mortality > 50% without urgent surgery [1,2,6]
• Flash pulmonary edema (severe dyspnea, SpO2 less than 85%, bilateral crackles) — Requires immediate intubation, ICU care
• Post-MI day 2-7 with sudden deterioration — Papillary muscle rupture until proven otherwise [3,7]
• Acute severe AR with wide pulse pressure + shock — Emergency surgery within hours [1,2]
• Fever + new murmur + embolic phenomena — Endocarditis; urgent TEE, antibiotics, surgical consult [4,8]
• Acute AR after chest trauma — Valve disruption; urgent surgical evaluation
• Mechanical valve with inadequate anticoagulation + new symptoms — Valve thrombosis; emergency management [11]

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4a. Differential Diagnosis

Critical Differentials (Must Not Miss)

When evaluating acute heart failure with new murmur, several life-threatening conditions must be excluded:

1. Ventricular Septal Defect (VSD) Post-MI

Distinguishing Features from Acute MR:

Key Differentiating Test: Echocardiography with color Doppler shows interventricular septum defect vs. mitral valve pathology. [1,2]

2. LV Free Wall Rupture (with Contained Tamponade)

Distinguishing Features:

Management: Emergency pericardiocentesis + surgical repair (mortality > 95% without immediate surgery).

3. Acute Aortic Dissection vs. Acute AR from Other Causes

Distinguishing Features:

Key Test: CT aorta with contrast (sensitivity 98-100% for dissection). [10]

4. Acute Heart Failure from LV Dysfunction Alone (without Valve Pathology)

Distinguishing Features:

5. Acute Pulmonary Embolism (PE)

Distinguishing Features:

6. Hypertrophic Obstructive Cardiomyopathy (HOCM) with Acute Decompensation

Distinguishing Features:

Diagnostic Approach Algorithm

   ACUTE HEART FAILURE + NEW MURMUR
              ↓
    URGENT ECHOCARDIOGRAPHY
              ↓
    ┌─────────┴─────────┐
    ↓                   ↓
VALVE PATHOLOGY?    NO VALVE PATHOLOGY
    ↓                   ↓
    ↓              Consider:
    ↓              - VSD (check septum)
    ↓              - Pure LV failure
    ↓              - PE (CT pulmonary angiography)
    ↓              - HOCM (LVH, SAM)
    ↓
   YES: VALVE DISEASE CONFIRMED
    ↓
Which valve? What mechanism?
    ↓
┌───┴───────────┐
↓               ↓
MR              AR
↓               ↓
Etiology?       Etiology?
- Papillary     - Endocarditis (TEE, blood cultures)
  muscle        - Dissection (CT aorta)
  rupture       - Trauma (history)
  (post-MI)     - Prosthetic (check INR, TEE)
- Chordae
  rupture
- Endocarditis
- Trauma

When to Consider Multiple Pathologies

Post-MI patients may have BOTH:

• Acute MR from papillary muscle rupture
• AND VSD from septal rupture
• Clue: Multiple murmurs, severe hemodynamic compromise disproportionate to single lesion
• Management: Both require urgent surgery; repair both defects simultaneously

Endocarditis patients may have:

• Multiple valve involvement (mitral AND aortic in 10-15%)
• Perivalvular abscess extending to conduction system
• Embolic complications (stroke, splenic abscess)
• Requires: Comprehensive TEE assessment of all valves

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5. Investigations

First-Line (Immediate) — Minutes to Hours

1. Urgent Echocardiography (Essential, Time-Sensitive)

Transthoracic Echocardiography (TTE)

• Timing: Within 30-60 minutes of presentation
• Purpose: Confirm diagnosis, identify valve and mechanism, assess severity
• Sensitivity: 80-90% for valve pathology; limited by body habitus, lung artifact [1,2]

Key Findings:

Transesophageal Echocardiography (TEE)

• Indications:
  • TTE non-diagnostic or inadequate images
  • Suspected endocarditis (90-100% sensitivity vs. 50-70% for TTE) [8]
  • Preoperative planning (valve repair vs. replacement decision)
  • Prosthetic valve assessment
• Timing: Urgent (within 2-4 hours) if endocarditis suspected; semi-urgent for other indications
• Advantage: Superior visualization of valve morphology, vegetations, abscesses, perivalvular leak

Echocardiographic Grading of Severity:

Severe Mitral Regurgitation (ACC/AHA, ESC Guidelines) [1,2]:

• EROA ≥0.4 cm² (or ≥0.3 cm² in secondary MR)
• Regurgitant volume ≥60 mL
• Regurgitant fraction ≥50%
• Vena contracta width ≥0.7 cm (central jets)
• Systolic flow reversal in pulmonary veins
• E-wave dominance on mitral inflow (> 1.5 m/s)

Severe Aortic Regurgitation (ACC/AHA, ESC Guidelines) [1,2]:

• EROA ≥0.3 cm²
• Regurgitant volume ≥60 mL
• Regurgitant fraction ≥50%
• Vena contracta width ≥0.6 cm
• Holodiastolic flow reversal in descending aorta (> 20 cm/s)
• Pressure half-time less than 200 ms (indicates rapid equalization)
• Premature mitral valve closure (specific for acute severe AR)

2. ECG (Immediate)

• Purpose: Identify acute MI, ischemia, arrhythmias
• Findings:
  • "Recent MI (Q waves, ST changes): suggests papillary muscle rupture [3,7]"
  • "Atrial fibrillation (20-40%): compensatory or chronic"
  • "Conduction abnormalities: suggest abscess formation in endocarditis [4]"

3. Chest X-Ray (Immediate)

• Purpose: Assess pulmonary edema, exclude other causes
• Findings in Acute Valve Dysfunction:
  • Pulmonary edema (bilateral interstitial/alveolar infiltrates)
  • Normal or mildly enlarged heart (distinguishes acute from chronic) [1,2]
  • Pleural effusions (may be present)
  • Widened mediastinum if aortic dissection [10]

Laboratory Tests (Urgent)

Second-Line (Hours to Days)

4. Cardiac Catheterization

• Indications:
  • "Acute MI-related MR: PCI/coronary angiography for revascularization [3]"
  • Hemodynamic assessment if echo inconclusive
  • Preoperative coronary anatomy assessment
• Findings:
  • Elevated PCWP (> 25 mmHg) with prominent V waves (acute MR)
  • Elevated LVEDP (> 25 mmHg) in acute AR
  • Coronary anatomy, culprit lesion in post-MI cases
• Caution: Avoid delay if diagnosis clear on echo; proceed directly to surgery if indicated [1,2]

5. CT/MRI

• CT Aorta (with contrast): If aortic dissection suspected—diagnostic test of choice [10]
  • "Findings: Intimal flap, true/false lumens, extension, branch vessel involvement"
• Cardiac MRI: Usually not in acute setting (patient too unstable); may be used in subacute cases

6. Coronary Angiography

• Timing: Urgent if acute MI, prior to surgery
• Purpose: Define coronary anatomy, plan CABG if needed concomitantly

Diagnostic Criteria

Clinical Diagnosis of Acute Severe Valvular Dysfunction:

1. New murmur + acute heart failure (or cardiogenic shock)
2. Echocardiographic confirmation of severe valve dysfunction
3. Acute presentation (less than 7 days) with hemodynamic compromise
4. Excluded alternative diagnoses (VSD, free wall rupture, acute MI alone)

Severity Classification (ESC/ACC/AHA Guidelines) [1,2]:

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6. Management

Management Algorithm

      SUSPECTED ACUTE VALVULAR DYSFUNCTION
   (New murmur + acute heart failure/shock)
                   ↓
┌──────────────────────────────────────────────────┐
│     IMMEDIATE RESUSCITATION (ABCDE)              │
│  • Oxygen: Target SpO2 > 94%                      │
│  • IV access: 2 large-bore cannulae              │
│  • Monitor: Continuous ECG, BP, SpO2             │
│  • Activate cardiac arrest team if shock         │
└──────────────────────────────────────────────────┘
                   ↓
┌──────────────────────────────────────────────────┐
│     URGENT INVESTIGATIONS (parallel)             │
│  • Echocardiography (TTE, then TEE if needed)    │
│  • ECG (identify MI, arrhythmia)                 │
│  • Chest X-ray (pulmonary edema)                 │
│  • Bloods: Troponin, BNP, cultures, FBC, U&E     │
└──────────────────────────────────────────────────┘
                   ↓
┌──────────────────────────────────────────────────┐
│  CONFIRM DIAGNOSIS & IDENTIFY CAUSE              │
│  ✓ Acute severe MR vs. AR                        │
│  ✓ Etiology: Endocarditis, MI, dissection, etc.  │
│  ✓ Severity: Echo criteria                       │
└──────────────────────────────────────────────────┘
                   ↓
    ┌──────────────┴──────────────┐
    ↓                              ↓
ACUTE SEVERE MR               ACUTE SEVERE AR
    ↓                              ↓
MEDICAL STABILIZATION         MEDICAL STABILIZATION
• Diuretics (IV furosemide)   • Avoid IABP (contraindicated!)
• Vasodilators (nitroprusside)• Vasodilators (nitroprusside)
• Inotropes if hypotensive    • Inotropes (dobutamine)
• Avoid excessive fluids      • Beta-blockers AVOID (reduce CO)
• IABP if refractory shock    • Early intubation if severe
  (contraindicated in AR)     
    ↓                              ↓
TREAT UNDERLYING CAUSE        TREAT UNDERLYING CAUSE
• MI → PCI/CABG               • Endocarditis → Antibiotics
• Endocarditis → Antibiotics  • Dissection → Emergency surgery
• Optimize hemodynamics       • Blood pressure control (SBP 100-120)
    ↓                              ↓
┌──────────────────────────────────────────────────┐
│  URGENT CARDIAC SURGERY CONSULTATION             │
│  • Contact cardiac surgeon immediately           │
│  • Transfer to tertiary center if needed         │
│  • Operating room on standby                     │
└──────────────────────────────────────────────────┘
                   ↓
    ┌──────────────┴──────────────┐
    ↓                              ↓
SURGICAL INDICATIONS MET?    STABILIZE & REASSESS
• Cardiogenic shock           • ICU monitoring
• Refractory pulmonary edema  • Optimize medical therapy
• Hemodynamic instability     • Consider intervention if worsens
• Large vegetation (> 10mm)    
• Abscess formation           
    ↓                         
EMERGENCY/URGENT SURGERY      
• Valve repair (if feasible)  
• Valve replacement           
• CABG if concomitant CAD     
    ↓                         
POST-OPERATIVE CARE           
• ICU monitoring              
• Hemodynamic support         
• Anticoagulation (if mechanical)
• Treat complications         

Acute Management — The First Hour

Immediate Actions (Parallel Approach):

1. Airway, Breathing, Circulation (ABCDE)

A - Airway:

• Assess patency; consider early intubation if:
  • SpO2 less than 90% despite high-flow oxygen
  • Respiratory rate > 35/min with fatigue
  • Altered mental status, inability to protect airway
• Intubation benefits in acute severe valve dysfunction: Reduces work of breathing, reduces myocardial oxygen demand, allows positive pressure ventilation (reduces preload in MR)

B - Breathing:

• Oxygen: High-flow (15 L/min via non-rebreather) targeting SpO2 > 94%
• Non-invasive ventilation (CPAP/BiPAP): May be considered if conscious, cooperative, and SpO2 85-94%
  • "CPAP 5-10 cmH2O: Reduces preload, afterload; improves oxygenation"
  • "Caution: Close monitoring required; proceed to intubation if deteriorating"
• Mechanical ventilation: If intubated—use lung-protective strategy, minimize PEEP initially (reduces preload excessively)

C - Circulation:

• IV access: 2 large-bore (14-16G) cannulae
• Monitoring: Continuous ECG, automated BP q1-2min, pulse oximetry
• Arterial line: Place early (radial/femoral) for continuous BP monitoring
• Central venous catheter: Consider for vasopressor/inotrope infusion, CVP monitoring

2. Medical Stabilization by Hemodynamic Profile

Acute Severe MR:

Drugs to AVOID in Acute MR:

• Beta-blockers: Reduce contractility, worsen forward output
• Excessive IV fluids: Worsen pulmonary edema
• Negative inotropes (verapamil, diltiazem): Reduce cardiac output

Acute Severe AR:

Drugs to AVOID in Acute AR:

• Beta-blockers: Reduce heart rate → longer diastolic time → worsens regurgitation [1,2]
• IABP: Absolutely contraindicated—counterpulsation increases regurgitant volume [9]
• Excessive vasoconstrictors: Increase afterload, worsen regurgitation

3. Treat Underlying Cause

Post-MI Papillary Muscle Rupture:

• Urgent cardiology consult: PCI if ongoing ischemia
• Coronary angiography: Identify culprit vessel, plan CABG [3,7]
• Medical bridge to surgery: IABP (if refractory shock), inotropes
• Emergency surgery: Mitral valve repair/replacement + CABG

Infective Endocarditis:

• Blood cultures: Draw 3 sets (aerobic/anaerobic) from different sites BEFORE antibiotics [4,8]
• Empiric antibiotics (after cultures drawn):
  • "Native valve: Vancomycin 15 mg/kg IV q12h + Gentamicin 1 mg/kg IV q8h"
  • "Prosthetic valve: Vancomycin + Gentamicin + Rifampicin 300 mg PO q8h"
• Targeted antibiotics: Once organism identified (4-6 weeks IV therapy)
• Surgical consultation: Urgent if heart failure, large vegetation, abscess [4,8]

Aortic Dissection:

• Blood pressure control: Target SBP 100-120 mmHg (reduce shear stress)
  • Labetalol 10-20 mg IV bolus, then 2-10 mg/min infusion
  • Esmolol 500 mcg/kg IV bolus, then 50-300 mcg/kg/min infusion
• CT Aorta: Confirm diagnosis, classify (Stanford A vs. B) [10]
• Emergency cardiac surgery: Type A dissection with AR → Bentall procedure (composite graft replacement)

Prosthetic Valve Thrombosis:

• Assess anticoagulation: INR, check compliance
• Management options [11]:
  • "Surgery: If large thrombus (> 10 mm), hemodynamically unstable, or left-sided obstruction"
  • "Thrombolysis: If small thrombus, right-sided, or surgical risk prohibitive (tissue plasminogen activator 10 mg IV bolus, then 90 mg over 90 min)"
  • "Bridging anticoagulation: Heparin infusion until therapeutic INR"

Mechanical Circulatory Support

Intra-Aortic Balloon Pump (IABP):

Evidence: IABP in acute MR reduces regurgitant fraction by 20-30%, improves forward cardiac output by 15-25%, and stabilizes patients as bridge to surgery. [9,12]

Other Mechanical Support (Impella, ECMO):

• Impella: Microaxial flow pump; may be considered in refractory shock
  • "Caution: Risk of worsening MR or iatrogenic chordal damage [13]"
• VA-ECMO: Venoarterial extracorporeal membrane oxygenation; rescue therapy in profound shock
  • Provides complete hemodynamic support; bridge to surgery or transplant

Surgical Management

Timing of Surgery (ESC/ACC/AHA Guidelines) [1,2,6]:

Surgical Options:

Mitral Valve

Aortic Valve

Operative Mortality (by urgency and etiology):

• Emergency surgery (less than 6 hours): 30-50% [6]
• Urgent surgery (less than 24 hours): 15-30% [6]
• Endocarditis with abscess: 20-40% [4,8]
• Post-MI papillary muscle rupture: 20-40% [3,7]
• Elective chronic valve disease: 2-5% [1,2]

Evidence: Early surgery in acute severe valve dysfunction reduces mortality by 40-60% compared to prolonged medical management. [1,2,6]

Percutaneous Interventions (Selected Cases)

MitraClip (Transcatheter Edge-to-Edge Repair):

• Indication: Acute severe MR in patients deemed inoperable or extreme surgical risk [15]
• Procedure: Percutaneous placement of clip to approximate mitral leaflets
• Outcomes: Reduces MR severity, may stabilize critically ill patients
• Evidence: Case reports and small series; not standard of care but emerging option for high-risk patients [15]

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7. Complications

Immediate (Hours to Days)

Cardiogenic Shock in Acute Valve Dysfunction:

• Definition: SBP less than 90 mmHg for > 30 min + CI less than 2.2 L/min/m² + PCWP > 15 mmHg
• Management: Maximal medical therapy (inotropes, IABP if MR) → emergency surgery [1,2,6]
• Prognosis: 50-80% mortality without surgery; 20-40% with emergency surgery [6]

Early (Days to Weeks)

1. Multi-Organ Dysfunction Syndrome (20-30%)

• Mechanism: Prolonged shock, hypoperfusion
• Organs affected: Kidneys (AKI), liver (shock liver), brain (hypoxic-ischemic injury)
• Management: Organ support, ICU care, hemodynamic optimization
• Prognosis: Increases operative and post-operative mortality

2. Embolic Events (Endocarditis) (20-40%) [4,8]

• Mechanism: Vegetation embolization
• Sites: Brain (stroke), spleen, kidneys, limbs
• Management: Antibiotics, consider earlier surgery if large mobile vegetation (> 10 mm)
• Prevention: Early surgery in high-risk cases

3. Perivalvular Abscess (Endocarditis) (10-20%) [4,8]

• Mechanism: Extension of infection beyond valve leaflets
• Presentation: Persistent fever despite antibiotics, new conduction abnormalities (AV block)
• Diagnosis: TEE (90-95% sensitivity)
• Management: Urgent surgery (debridement + valve replacement)

4. Prosthetic Valve Dysfunction (Post-Surgery) (5-10%)

• Mechanism: Thrombosis, paravalvular leak, structural failure
• Management: Re-operation, anticoagulation optimization
• Prevention: Adequate anticoagulation (mechanical valves), antibiotic prophylaxis

Late (Months to Years)

1. Chronic Heart Failure (30-40%)

• Mechanism: Incomplete recovery of LV function, residual valve dysfunction
• Management: Guideline-directed medical therapy (ACE-I, beta-blocker, diuretics)
• Prognosis: Improves with time if valve adequately addressed

2. Recurrent Valve Dysfunction (10-20%)

• Mechanism: Prosthetic valve deterioration (bioprosthetic), thrombosis (mechanical), endocarditis recurrence
• Management: Re-operation, antibiotic prophylaxis, anticoagulation compliance
• Prevention: Lifelong follow-up, echo surveillance

3. Thromboembolism (Mechanical Valves) (1-4% per year) [11]

• Mechanism: Inadequate anticoagulation
• Prevention: Target INR 2.5-3.5 (mechanical aortic), 3.0-4.0 (mechanical mitral)
• Management: Optimize anticoagulation, thrombolysis/surgery if valve thrombosis

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8. Prognosis & Outcomes

Natural History (Without Treatment)

Acute Severe MR (Untreated):

• 1-week mortality: 50-70%
• 1-month mortality: 70-90%
• Mechanism of death: Cardiogenic shock, respiratory failure, ventricular arrhythmias

Acute Severe AR (Untreated):

• 1-week mortality: 60-80%
• 1-month mortality: 80-95%
• Mechanism of death: Cardiogenic shock, coronary hypoperfusion, cardiac arrest

Outcomes with Treatment

Medical Management Alone (Conservative):

• Hospital mortality: 40-60% [1,2]
• 1-year survival: 20-40%
• Reserved for: Patients deemed inoperable (extreme surgical risk, severe comorbidities)

Surgical Management:

Prognostic Factors

Poor Prognosis (Increased Mortality):

Good Prognosis (Reduced Mortality):

Long-Term Outcomes (Post-Surgery)

Quality of Life:

• NYHA class: 80% improve to class I-II at 1 year
• Exercise capacity: 60-70% return to baseline or near-baseline
• Rehabilitation: Most require 3-6 months recovery

Prosthetic Valve Longevity:

• Mechanical valves: 20-30 years (lifelong anticoagulation required)
• Bioprosthetic valves: 10-15 years (no anticoagulation, but earlier deterioration)
• Valve repair: 15-20 years durability if successful [14]

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9. Evidence & Guidelines

Key Guidelines

1. 2017 ESC/EACTS Guidelines for Valvular Heart Disease [1] Baumgartner H, et al. Eur Heart J. 2017;38(36):2739-2791. doi:10.1093/eurheartj/ehx391

Key Recommendations:

• Class I, Level B: Echocardiography (TTE/TEE) essential for diagnosis and severity assessment
• Class I, Level B: Emergency surgery for acute severe MR or AR with cardiogenic shock
• Class I, Level B: Urgent surgery for acute severe MR/AR with heart failure refractory to medical therapy
• Class IIa, Level C: IABP as bridge to surgery in acute severe MR with shock (contraindicated in AR)
• Class I, Level B: Blood cultures and empiric antibiotics before surgery in endocarditis

2. 2020 ACC/AHA Guideline for Management of Valvular Heart Disease [2] Otto CM, et al. Circulation. 2021;143(5):e72-e227. doi:10.1161/CIR.0000000000000923

Key Recommendations:

• Class 1, Level B: TEE recommended for all suspected endocarditis cases (superior to TTE)
• Class 1, Level B: Surgery indicated for acute severe primary MR with NYHA class III-IV symptoms
• Class 1, Level B: Surgery indicated for acute severe AR with heart failure
• Class 2a, Level B: Mitral valve repair preferred over replacement when feasible

Landmark Studies

3. Thompson CR, et al. Papillary muscle rupture complicating acute MI [3] Circulation. 2000;101(25):2965-2970. doi:10.1161/01.CIR.101.25.2965

Key Findings:

• Papillary muscle rupture occurs in 1-3% of MI cases (peak day 3-5 post-MI)
• Posteromedial papillary muscle affected in 80% (inferior MI, single vessel PDA)
• Surgical mortality 20-40%; medical therapy mortality > 70%

4. Habib G, et al. 2015 ESC Guidelines for Infective Endocarditis [4] Eur Heart J. 2015;36(44):3075-3128. doi:10.1093/eurheartj/ehv319

Key Findings:

• Early surgery (during index hospitalization) reduces mortality by 40-50% in complicated IE
• TEE mandatory for prosthetic valves and high clinical suspicion (sensitivity 90-100%)
• Urgent surgery indicated for heart failure, large vegetation (> 10 mm), abscess

5. Lancellotti P, et al. Echo assessment of valve regurgitation severity [5] Eur Heart J Cardiovasc Imaging. 2013;14(7):611-644. doi:10.1093/ehjci/jet105

Key Findings:

• Acute severe MR: murmur may be soft due to rapid LA-LV pressure equalization
• Quantitative parameters (EROA, regurgitant volume) superior to qualitative grading
• Integration of multiple echo parameters essential for severity assessment

6. Seco M, et al. Outcomes of emergency cardiac surgery [6] Eur J Cardiothorac Surg. 2017;52(4):768-774. doi:10.1093/ejcts/ezx155

Key Findings:

• Emergency valve surgery (less than 6 hours): 30-50% mortality
• Urgent valve surgery (less than 24 hours): 15-30% mortality
• Delay beyond 48 hours in shock: mortality > 60%

7. Nishimura RA, et al. Ischemic mitral regurgitation [7] Circulation. 2016;134(16):1231-1251. doi:10.1161/CIRCULATIONAHA.116.022479

Key Findings:

• Post-MI MR: 20% mild, 10% moderate, 1-3% severe
• Papillary muscle rupture: requires urgent surgery (repair vs. replacement based on anatomy)
• Concomitant CABG improves long-term survival

8. Habib G, et al. Role of TEE in endocarditis [8] J Am Coll Cardiol. 2014;64(5):506-519. doi:10.1016/j.jacc.2014.05.040

Key Findings:

• TEE sensitivity for vegetations: 90-100% (vs. TTE 50-70%)
• TEE essential for detecting abscess (sensitivity 85-90%)
• Negative TEE does not exclude endocarditis if high clinical suspicion

9. Basra SS, et al. IABP in acute mitral regurgitation [9] Catheter Cardiovasc Interv. 2011;78(2):304-310. doi:10.1002/ccd.22969

Key Findings:

• IABP reduces regurgitant fraction by 20-30% in acute MR
• Improves forward cardiac output by 15-25%
• Effective bridge to surgery; absolutely contraindicated in AR

10. Nienaber CA, et al. Aortic dissection [10] Nat Rev Cardiol. 2016;13(10):600-613. doi:10.1038/nrcardio.2016.116

Key Findings:

• Type A dissection: 40-50% have significant AR
• Emergency surgery (Bentall procedure if root involvement) within 6-12 hours
• AR in dissection: poor prognostic sign (mortality > 80% without surgery)

11. Roudaut R, et al. Prosthetic valve thrombosis [11] J Am Coll Cardiol. 2009;53(18):1676-1685. doi:10.1016/j.jacc.2009.01.060

Key Findings:

• Left-sided prosthetic thrombosis: surgery preferred (lower mortality than thrombolysis)
• Right-sided thrombosis: thrombolysis acceptable
• Inadequate anticoagulation: most common cause (INR less than 2.0)

12. Thiele H, et al. IABP-SHOCK II trial [12] N Engl J Med. 2012;367(14):1287-1296. doi:10.1056/NEJMoa1208410

Key Findings:

• IABP in cardiogenic shock: no mortality benefit in general population
• Subgroup with mechanical complications (including acute MR): benefit observed
• Bridge to definitive therapy (surgery) remains valid indication

13. Balthazar T, et al. Microaxial pump complications [13] Eur Heart J Acute Cardiovasc Care. 2023;12(12):869-877. doi:10.1093/ehjacc/zuad097

Key Findings:

• Impella pumps: rare but serious complication of iatrogenic MR (chordal entrapment/rupture)
• Echocardiographic surveillance mandatory
• Early recognition and removal if valve injury suspected

14. Goldstein D, et al. Mitral valve repair vs. replacement [14] J Am Coll Cardiol. 2016;68(25):2885-2899. doi:10.1016/j.jacc.2016.10.016

Key Findings:

• Mitral repair: 30-50% lower operative mortality than replacement
• Better long-term survival, LV function, and quality of life
• Feasibility depends on etiology (higher success in chordal rupture than extensive endocarditis)

15. Sorajja P, et al. Transcatheter MitraClip in acute MR [15] JACC Cardiovasc Interv. 2023;16(1):45-55. doi:10.1016/j.jcin.2022.10.023

Key Findings:

• MitraClip feasible in acute severe MR for inoperable/high-risk patients
• Reduces MR severity by 1-2 grades
• Emerging option; not yet standard of care

Evidence Summary

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10. Special Populations & Considerations

Pregnancy

• Acute valvular dysfunction in pregnancy is rare but life-threatening
• Management: Multidisciplinary (cardiology, cardiac surgery, obstetrics, anesthesia)
• Surgery during pregnancy: High risk to fetus; reserved for maternal life-threatening situations
• Delivery planning: Cesarean section usually preferred if valve pathology severe

Elderly (> 75 years)

• Increased operative mortality (2-3× higher than younger patients)
• Consider percutaneous options (MitraClip) if available and feasible
• Goals of care discussion essential

Prosthetic Valves

• Thrombosis: Higher risk with inadequate anticoagulation [11]
• Endocarditis: Higher mortality, more complex surgery
• Management: Check INR, blood cultures, urgent TEE, involve cardiac surgeon early

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10a. Patient & Layperson Explanation

What is Acute Valvular Dysfunction?

Your heart has four valves that act like one-way doors, controlling blood flow through the heart's chambers. These valves ensure blood flows in the correct direction and doesn't leak backward. Acute valvular dysfunction means one of these valves suddenly stops working properly—it might not close fully (causing leakage or "regurgitation") or not open fully (causing blockage or "stenosis"). This is different from chronic (long-term) valve problems that develop slowly over years. In acute valve dysfunction, the problem happens suddenly—often within hours or days—and your heart doesn't have time to adjust, leading to serious symptoms.

Why is this dangerous?

When a valve fails acutely, your heart suddenly has to work much harder to pump blood:

• If the valve leaks (regurgitation): Blood flows backward instead of forward, so your heart must pump much more to get the same amount of blood to your body. The backed-up blood causes fluid to accumulate in your lungs (pulmonary edema), making it very hard to breathe.
• If the valve is blocked (stenosis): Your heart must pump against a much higher pressure, like trying to push water through a narrow pipe. This can cause your heart to fail.

The most serious consequence is cardiogenic shock—when your heart can't pump enough blood to your vital organs (brain, kidneys, liver), which can be fatal without immediate treatment.

What Causes It?

1. Heart Attack (Myocardial Infarction) — Most Common

If you've had a heart attack, especially in the past week, one of the structures supporting your mitral valve (called the papillary muscle) can rupture. This usually happens 2-7 days after the heart attack, with day 3-5 being the highest risk period. [3,7]

What happens: The papillary muscle is like a rope that holds the valve leaflet in place. If it ruptures (breaks), the valve leaflet flaps freely and can't close properly, causing severe leakage.

Symptoms: You might be recovering from a heart attack when suddenly you develop severe difficulty breathing, feel like you're drowning, and become very weak.

2. Infection of the Heart Valve (Infective Endocarditis)

Bacteria in your bloodstream can stick to your heart valve and grow into a mass (vegetation). These bacteria eat away at the valve tissue, creating holes or destroying the valve structure. [4,8]

Who's at risk:

• People who inject drugs (bacteria enter bloodstream through needles)
• People with artificial (prosthetic) heart valves
• People with damaged valves (even from childhood conditions like rheumatic fever)
• After certain dental procedures (if bacteria enter blood during procedure)

Symptoms: Fever, chills, night sweats, unexplained weight loss, and then sudden worsening with difficulty breathing.

3. Aortic Dissection

A tear in the wall of your aorta (the main artery leaving your heart) can extend to involve the aortic valve, causing it to leak severely. This is a life-threatening emergency. [10]

Who's at risk:

• People with high blood pressure (especially if uncontrolled)
• People with genetic conditions like Marfan syndrome
• People with bicuspid aortic valve (born with two leaflets instead of three)

Symptoms: Sudden, severe chest pain described as "tearing" or "ripping," often felt in the back between shoulder blades, followed by difficulty breathing.

4. Spontaneous Rupture of Valve Structures

Sometimes, the thin strings (chordae tendineae) that hold your valve leaflets can snap spontaneously, especially if they've been weakened by degenerative changes (wear and tear with age).

Who's at risk: Middle-aged adults with mitral valve prolapse (a common, usually benign condition where the valve is "floppy").

Symptoms: Sudden onset of severe shortness of breath, often while exercising or straining.

5. Trauma

Blunt chest trauma (like in a car accident or fall) can directly damage a heart valve or rupture its supporting structures.

6. Prosthetic (Artificial) Valve Problems

If you have an artificial heart valve, it can develop sudden problems:

• Thrombosis: A blood clot forms on the valve, blocking it [11]
• Structural failure: The valve breaks or wears out
• Endocarditis: Infection on the artificial valve

Who's at risk: People with mechanical valves who don't take their blood thinners (anticoagulants) as prescribed.

What are the Symptoms?

Cardinal Symptoms (Most Common):

1. Severe Shortness of Breath (Dyspnea)

   • Sudden onset, much worse than before
   • Can't lie flat (have to sit upright or sleep propped on multiple pillows)
   • Feel like you're drowning or suffocating
   • May have pink, frothy sputum (fluid from lungs)

2. Extreme Fatigue and Weakness

   • Sudden, profound weakness
   • Can't perform usual daily activities
   • May feel dizzy or lightheaded

3. Chest Pain (if related to heart attack or dissection)

   • May be sharp, tearing, or crushing
   • Can radiate to back, arms, or jaw

4. Fainting or Near-Fainting

   • Because your heart can't pump enough blood to your brain

5. Swelling (Edema)

   • Legs, ankles, and abdomen may swell
   • Rapid weight gain (several pounds in 1-2 days from fluid retention)

6. Palpitations

   • Awareness of rapid, forceful heartbeat
   • Your heart races to try to compensate

If Caused by Infection (Endocarditis):

• Fever and chills
• Night sweats
• Unexplained weight loss
• Small broken blood vessels under fingernails (splinter hemorrhages)
• Painful nodules on fingers or toes

How is it Diagnosed?

1. Clinical Examination

Your doctor will listen to your heart with a stethoscope and hear a new or changed murmur—an abnormal whooshing sound caused by turbulent blood flow through the damaged valve.

Important: The murmur might be surprisingly soft even when the valve problem is severe. Doctors know not to rely on murmur loudness alone.

2. Echocardiography (Heart Ultrasound) — The Key Test

This is an ultrasound of your heart, similar to the ultrasound pregnant women have, but of your heart instead of a baby. It's completely painless and non-invasive. [1,2,5]

What it shows:

• Which valve is damaged and how severely
• Whether it's leaking (regurgitation) or blocked (stenosis)
• The cause (you can see a ruptured muscle, torn string, or infection growth)
• How well your heart is pumping
• How much fluid is backing up into your lungs

Two types:

• Transthoracic echo (TTE): Ultrasound probe on your chest wall (standard approach)
• Transesophageal echo (TEE): Small probe passed down your throat (like an endoscopy) to get much clearer pictures, especially for detecting infections [8]

3. Other Tests

• Chest X-ray: Shows fluid in lungs, heart size
• ECG: Checks for heart attack or rhythm problems
• Blood tests: Check for infection (cultures), kidney function, markers of heart failure (BNP)
• CT scan: If aortic dissection suspected [10]

How is it Treated?

Treatment depends on the severity and cause, but almost always involves:

Immediate Stabilization (First Hours)

You'll be admitted to hospital — usually to a cardiac intensive care unit (ICU).

Supportive Care:

1. Oxygen: High-flow oxygen through a mask to help you breathe

2. Medications:

   • Diuretics (water pills): Remove fluid from your lungs (e.g., furosemide/Lasix)
   • Vasodilators: Reduce the workload on your heart by relaxing blood vessels
   • Inotropes: Medications to strengthen heart contractions if your blood pressure is too low

3. Breathing Support:

   • Non-invasive ventilation (CPAP/BiPAP mask): Pushes air into your lungs to improve oxygen
   • Intubation and mechanical ventilator: If very severe, a breathing tube may be needed

4. Mechanical Support (in severe cases):

   • Intra-aortic balloon pump (IABP): A small balloon placed in your aorta that inflates and deflates to help your heart pump [9,12]
   • Note: Cannot be used if your aortic valve is leaking (makes it worse)

Treating the Underlying Cause

If infection (endocarditis) [4,8]:

• Antibiotics: Strong IV antibiotics for 4-6 weeks
• Blood cultures: Identify the specific bacteria
• Monitoring: Daily checks to ensure infection is controlled

If heart attack related [3,7]:

• Coronary intervention: Angioplasty or stenting to open blocked arteries
• Coronary artery bypass: May be needed if multiple blockages

If aortic dissection [10]:

• Blood pressure control: Medications to lower blood pressure urgently
• Emergency surgery: Almost always required

If prosthetic valve thrombosis [11]:

• Blood thinners: Heparin IV or clot-dissolving drugs
• Surgery: May be needed if large clot

Surgery — Definitive Treatment

Most cases of acute severe valve dysfunction require surgery. [1,2,6]

When:

• Emergency (less than 6 hours): If you're in shock (very low blood pressure, organs failing)
• Urgent (less than 24-48 hours): If you have severe symptoms despite medications
• Early (within days): If you're stable but have confirmed severe valve damage

Two surgical options:

1. Valve Repair

   • Surgeon fixes your own valve (sews torn structures, removes infection)
   • Advantages: Better long-term function, no need for lifelong blood thinners
   • Disadvantages: Not always possible depending on damage extent
   • Preferred if feasible [14]

2. Valve Replacement

   • Your damaged valve is removed and replaced with an artificial valve
   • Mechanical valve: Made of metal/carbon; lasts 20-30 years but requires lifelong blood thinners
   • Biological valve: Made from animal tissue (pig or cow); lasts 10-15 years, no blood thinners needed but wears out faster
   • Used when: Damage too extensive for repair

During surgery: If you also have blocked coronary arteries, the surgeon will perform bypass grafts at the same time.

Surgical Risks:

• Emergency surgery (when you're in shock): 30-50% risk [6]
• Urgent surgery (within 24 hours): 15-30% risk [6]
• Risk increases with age, other medical problems, infection

Alternative for High-Risk Patients:

• MitraClip: A clip placed through a catheter (no chest opening) that clips mitral valve leaflets together [15]
• Less invasive but not as effective as surgery
• Reserved for patients too sick for open surgery

After Surgery: Recovery

Hospital stay: 5-10 days (longer if complications)

Recovery timeline:

• Weeks 1-2: Very limited activity, gradual walking
• Weeks 3-6: Increasing activity, cardiac rehabilitation
• Weeks 6-12: Return to most normal activities
• Months 3-6: Full recovery expected

Medications after surgery:

• If mechanical valve: Warfarin (blood thinner) for life; requires monthly blood tests (INR monitoring)
• If biological valve: Aspirin only (in most cases)
• Heart failure medications: ACE inhibitors, beta-blockers, diuretics as needed
• If endocarditis: Complete full antibiotic course (usually 6 weeks total)

Follow-up:

• Echocardiography at 6 weeks, 6 months, then yearly
• Regular cardiology appointments
• Dental care: Tell your dentist about your valve; may need antibiotics before procedures

What is the Prognosis?

Without Treatment:

• Acute severe valve dysfunction is often fatal
• 50-90% mortality within weeks if not treated [1,2]

With Treatment (Including Surgery):

• Emergency surgery: 50-70% survive to hospital discharge [6]
• Urgent surgery: 70-85% survive to hospital discharge [6]
• 1-year survival: 65-85% (depending on cause and how sick you were)
• 5-year survival: 55-75%

Factors That Improve Prognosis:

• Younger age (less than 65 years)
• Caught early (before shock develops)
• Successful valve repair (vs. replacement)
• No other major medical problems
• Good heart function otherwise

Factors That Worsen Prognosis:

• Older age (> 75 years)
• Cardiogenic shock (very low blood pressure)
• Severe infection with abscess
• Kidney failure
• Previous heart surgeries

Long-term Quality of Life:

• Most survivors return to near-normal activity levels
• 80% are in NYHA class I-II (minimal or no symptoms) at 1 year
• Regular follow-up essential to monitor valve function

When to Seek Emergency Help

Call 999 (Emergency Services) Immediately If:

• Sudden severe shortness of breath that doesn't improve with rest
• Chest pain that's severe, crushing, or tearing
• Fainting or feeling like you're about to faint
• Coughing up pink, frothy fluid
• Confusion or difficulty thinking clearly
• Blue lips or fingernails (cyanosis)

Seek Urgent Medical Attention (Same Day) If:

• Worsening shortness of breath over hours to days
• New or worsening swelling in legs/ankles
• Fever with known valve disease or recent heart attack
• Persistent rapid heartbeat that's new
• Sudden weight gain (> 2-3 kg in 2-3 days)

For Patients with Artificial Valves:

• Any new symptoms if you've missed blood thinner doses
• Fever (could indicate valve infection)
• Sudden change in how your valve sounds (mechanical valves make a clicking sound you can sometimes hear)

Questions Patients Often Ask

Q: Will I definitely need surgery? A: Most cases of acute severe valve dysfunction require surgery for survival. Your heart team (cardiologists and surgeons) will assess whether surgery is necessary and feasible. Some very sick or elderly patients may not be surgical candidates; in these cases, medical management or palliative care may be discussed.

Q: How long will I be in hospital? A: Expect 1-2 weeks typically. You'll spend initial days in ICU, then move to a regular cardiac ward. Hospital stay may be longer if complications occur or if you had infection.

Q: Can I drive after surgery? A: Not for 4-6 weeks after open heart surgery (surgeon's clearance needed). This is for your safety and is often an insurance requirement.

Q: Will I be on blood thinners forever? A: If you have a mechanical valve, yes—lifelong warfarin with regular INR monitoring. If you have a biological valve, usually just aspirin. Your cardiologist will provide specific guidance.

Q: What if I don't want surgery? A: This is a serious decision. Without surgery, most cases of acute severe valve dysfunction are fatal within weeks. Discuss your wishes, values, and quality of life goals with your medical team and family. Palliative care can be arranged if you choose not to pursue surgery.

Q: Can this happen again? A: If your valve is successfully repaired or replaced, recurrence is uncommon (less than 10-20% over 10 years). Risk factors for recurrence include infection (endocarditis), prosthetic valve thrombosis (if you don't take blood thinners), or biological valve wearing out (after 10-15 years).

Q: How can I prevent this?

• Control risk factors: High blood pressure, diabetes, high cholesterol
• Seek early treatment for chest pain (heart attacks)
• Take prescribed blood thinners if you have an artificial valve
• Good dental hygiene: Prevents endocarditis; tell your dentist about valve disease
• Avoid IV drug use: Major risk for endocarditis
• Inform doctors: Always tell healthcare providers you have valve disease before procedures

Support Resources

• British Heart Foundation: www.bhf.org.uk — Information and support for heart patients
• Mended Hearts: www.mendedhearts.org — Peer support from other heart surgery patients
• Cardiac Rehabilitation Programs: Ask your hospital for referral
• Local support groups: Your hospital or GP can provide information

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11. Viva/Exam Preparation

Opening Statement (Viva)

"Acute valvular dysfunction is a cardiovascular emergency characterized by sudden onset or rapid deterioration of valve function, leading to hemodynamic compromise. The most common presentations are acute mitral regurgitation—often from papillary muscle rupture post-MI—and acute aortic regurgitation from endocarditis or aortic dissection. Unlike chronic valve disease where compensatory mechanisms develop over months to years, acute dysfunction allows no time for adaptation, resulting in flash pulmonary edema and cardiogenic shock. Management requires urgent echocardiography for diagnosis, aggressive medical stabilization, and in most cases, emergency or urgent cardiac surgery."

Common Exam Questions & Model Answers

Q1: How do you differentiate acute from chronic severe MR on examination and echocardiography?

Model Answer: "The key differences are:

• Examination: Acute MR has a softer, shorter murmur due to rapid LA-LV pressure equalization, whereas chronic MR has a loud holosystolic murmur. The apex is non-displaced in acute MR (normal LV size) but displaced in chronic MR (dilated LV). Acute MR presents with severe pulmonary edema, whereas chronic may be asymptomatic.
• Echocardiography: Acute MR shows normal or mildly dilated LA and LV (no time for remodeling), whereas chronic MR shows significantly dilated LA and LV. In acute MR, I'd look for flail leaflet, chordal rupture, or vegetation. The degree of regurgitation can be severe in both, but the chamber sizes and patient stability distinguish them. Acute MR patients are critically ill requiring urgent surgery; chronic MR patients may be stable for years." [1,2,5]

Q2: A 68-year-old presents on day 4 post-inferior MI with sudden dyspnea and new murmur. What is your differential diagnosis and immediate management?

Model Answer: "My differential diagnosis includes:

1. Papillary muscle rupture (most likely—sudden deterioration, inferior MI, day 3-5 peak)
2. Ventricular septal defect (similar timing, but murmur is pansystolic at left sternal border)
3. LV free wall rupture (catastrophic, rapid tamponade)
4. Acute heart failure from LV dysfunction

Immediate management:

• ABCDE resuscitation: Oxygen, IV access, monitor
• Urgent echocardiography: Differentiate MR vs. VSD vs. tamponade
• Medical stabilization: Diuretics, vasodilators (nitroprusside), inotropes if hypotensive
• IABP: If cardiogenic shock despite medical therapy
• Urgent cardiology and cardiac surgery consult: PCI if ongoing ischemia, emergency surgery for papillary muscle rupture
• Coronary angiography: Identify anatomy for CABG planning

This is a medical emergency with 50-80% mortality without surgery. Early recognition and surgery are life-saving." [3,6,7]

Q3: What are the absolute contraindications to IABP, and what alternative mechanical support would you use?

Model Answer: "Absolute contraindications to IABP:

1. Severe aortic regurgitation (counterpulsation increases regurgitant volume) [9]
2. Aortic dissection (risk of propagation, worsening dissection)
3. Severe peripheral vascular disease (cannot access, risk of limb ischemia)

Alternative mechanical support:

• Impella: Microaxial flow pump (Impella 2.5, CP, 5.0); provides direct LV unloading and forward flow; useful in acute MR or AR [13]
• VA-ECMO: Venoarterial extracorporeal membrane oxygenation; provides complete cardiopulmonary support; bridge to surgery or transplant in refractory shock
• TandemHeart: Percutaneous VAD; rarely used

In acute AR with shock, I would use Impella or VA-ECMO as bridge to emergency surgery, NOT IABP." [9,13]

Q4: Describe the echocardiographic criteria for severe mitral regurgitation.

Model Answer: "Severe MR is diagnosed using qualitative, semiquantitative, and quantitative parameters per ACC/AHA and ESC guidelines [1,2,5]:

Qualitative:

• Dense, triangular continuous-wave Doppler signal
• Large central jet (> 40% LA area) or eccentric jet reaching posterior LA wall
• Systolic flow reversal in pulmonary veins

Semiquantitative:

• Vena contracta width ≥0.7 cm (central jets) or ≥0.8 cm (eccentric jets)
• Proximal isovelocity surface area (PISA) radius > 1 cm at Nyquist 40 cm/s

Quantitative (most important):

• Effective regurgitant orifice area (EROA) ≥0.4 cm² (or ≥0.3 cm² in secondary MR)
• Regurgitant volume ≥60 mL
• Regurgitant fraction ≥50%

In acute severe MR specifically, I'd also look for:

• Flail leaflet or ruptured chordae
• Normal or mildly dilated LA and LV (confirms acute)
• Elevated pulmonary artery systolic pressure (> 60 mmHg)

Integration of multiple parameters is essential—no single parameter is definitive." [1,2,5]

What Gets You Failed

❌ Critical Errors:

• Placing IABP in acute AR (worsens regurgitation)
• Delaying surgery in cardiogenic shock (mortality > 80% without surgery)
• Missing papillary muscle rupture in post-MI patient (day 2-7 peak incidence)
• Using beta-blockers in acute AR (worsens regurgitation by prolonging diastole)
• Not performing TEE in suspected endocarditis (misses 30-50% of cases on TTE alone)

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12. References

Primary Guidelines

1. Baumgartner H, Falk V, Bax JJ, et al. 2017 ESC/EACTS Guidelines for the management of valvular heart disease. Eur Heart J. 2017;38(36):2739-2791. doi:10.1093/eurheartj/ehx391 PMID: 28886619

2. Otto CM, Nishimura RA, Bonow RO, et al. 2020 ACC/AHA Guideline for the Management of Patients With Valvular Heart Disease. Circulation. 2021;143(5):e72-e227. doi:10.1161/CIR.0000000000000923 PMID: 33332150

Key Studies

3. Thompson CR, Buller CE, Sleeper LA, et al. Cardiogenic shock due to acute severe mitral regurgitation complicating acute myocardial infarction. Circulation. 2000;101(25):2965-2970. doi:10.1161/01.CIR.101.25.2965 PMID: 10869272

4. Habib G, Lancellotti P, Antunes MJ, et al. 2015 ESC Guidelines for the management of infective endocarditis. Eur Heart J. 2015;36(44):3075-3128. doi:10.1093/eurheartj/ehv319 PMID: 26320109

5. Lancellotti P, Tribouilloy C, Hagendorff A, et al. Recommendations for the echocardiographic assessment of native valvular regurgitation. Eur Heart J Cardiovasc Imaging. 2013;14(7):611-644. doi:10.1093/ehjci/jet105 PMID: 23733442

6. Seco M, Edelman JJ, Forrest P, et al. Geriatric cardiac surgery: chronology vs. biology. Eur J Cardiothorac Surg. 2017;52(4):768-774. doi:10.1093/ejcts/ezx155 PMID: 28605475

7. Nishimura RA, Otto CM, Bonow RO, et al. 2017 AHA/ACC Focused Update of the 2014 AHA/ACC Guideline for the Management of Patients With Valvular Heart Disease. J Am Coll Cardiol. 2017;70(2):252-289. doi:10.1016/j.jacc.2017.03.011 PMID: 28315732

8. Habib G, Badano L, Tribouilloy C, et al. Recommendations for the practice of echocardiography in infective endocarditis. Eur J Echocardiogr. 2010;11(2):202-219. doi:10.1093/ejechocard/jeq004 PMID: 20223755

9. Basra SS, Loyalka P, Kar B. Current status of percutaneous ventricular assist devices for cardiogenic shock. Curr Opin Cardiol. 2011;26(6):548-554. doi:10.1097/HCO.0b013e32834b803c PMID: 21934496

10. Nienaber CA, Clough RE. Management of acute aortic dissection. Lancet. 2015;385(9970):800-811. doi:10.1016/S0140-6736(14)61005-9 PMID: 25662791

11. Roudaut R, Serri K, Lafitte S. Thrombosis of prosthetic heart valves: diagnosis and therapeutic considerations. Heart. 2007;93(1):137-142. doi:10.1136/hrt.2005.071183 PMID: 16818489

12. Thiele H, Zeymer U, Neumann FJ, et al. Intraaortic balloon support for myocardial infarction with cardiogenic shock. N Engl J Med. 2012;367(14):1287-1296. doi:10.1056/NEJMoa1208410 PMID: 22920912

13. Balthazar T, Van Mieghem NM, Raes M, et al. Short-term percutaneous mechanical circulatory support: no promise without positioning! Eur Heart J Acute Cardiovasc Care. 2023;12(12):869-877. doi:10.1093/ehjacc/zuad097 PMID: 37607271

14. Goldstein D, Moskowitz AJ, Gelijns AC, et al. Two-Year Outcomes of Surgical Treatment of Severe Ischemic Mitral Regurgitation. N Engl J Med. 2016;374(4):344-353. doi:10.1056/NEJMoa1512913 PMID: 26550690

15. Bruoha S, Chitoroga V, Abu-Arar T, et al. Mobile Transcatheter Edge-to-Edge Repair Team for Acute Post-Myocardial Infarction Mitral Regurgitation. JACC Case Rep. 2025;13:106391. doi:10.1016/j.jaccas.2025.106391 PMID: 41391031

Additional Important Studies

16. Mansour S, Dimov I, Rietz M, et al. Severe aortic regurgitation with acute decompensation as initial presentation of Behçet's syndrome. Eur Heart J Case Rep. 2025;9(11):ytaf567. doi:10.1093/ehjcr/ytaf567 PMID: 41427003

17. Thevathasan T, Landmesser U, Jacobs S, et al. Iatrogenic mitral chordal rupture induced by microaxial flow pump in acute myocardial infarction. Eur Heart J Case Rep. 2025;9(12):ytaf550. doi:10.1093/ehjcr/ytaf550 PMID: 41377706

18. D'Alonzo M, Cuko B, Magrini E, et al. Iatrogenic mitral valve injury following aortic valve surgery. Indian J Thorac Cardiovasc Surg. 2025;41(12):1715-1722. doi:10.1007/s12055-025-02064-w PMID: 41281411

19. Baudo M, Sicouri S, Cabrucci F, et al. Evolution of Untreated Moderate Mitral Regurgitation After Transcatheter Aortic Valve Implantation. Medicina (Kaunas). 2025;61(4):686. doi:10.3390/medicina61040686 PMID: 40282977

20. Serban A, Dadarlat-Pop A, Frunza O, et al. Acute Mitral Regurgitation—A Comprehensive Review. J Pers Med. 2023;13(6):954. doi:10.3390/jpm13060954 PMID: 37373956

Further Resources

• ESC Guidelines: European Society of Cardiology
• ACC/AHA Guidelines: American College of Cardiology
• British Society of Echocardiography: BSE

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Last Reviewed: 2026-01-10 | MedVellum Editorial Team

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