A 28-year-old woman from rural India presents with dyspnea on exertion and orthopnea for 3 months. On examination, she has an opening snap, diastolic murmur at the apex, and signs of pulmonary edema. Chest X-ray shows cardiomegaly and pulmonary congestion. Echocardiography confirms mitral stenosis with a valve area of 1.2 cm² and moderate left atrial enlargement. She is currently on diuretics and digoxin. What is the most appropriate next step in management?

Explanation

## Clinical Context This patient has symptomatic mitral stenosis (MS) with a valve area of 1.2 cm² (moderate-to-severe stenosis, critical threshold ≤1.5 cm²) presenting with signs of left heart failure and pulmonary edema despite medical therapy. ## Management Algorithm for Symptomatic Mitral Stenosis ```mermaid flowchart TD A[Mitral stenosis diagnosed]:::outcome --> B{Symptomatic?}:::decision B -->|No| C[Medical management + monitoring]:::action B -->|Yes| D{Valve area & anatomy}:::decision D -->|Favorable anatomy<br/>Valve area 1.0-1.5 cm²| E[Anticoagulation + Balloon mitral valvotomy]:::action D -->|Unfavorable anatomy<br/>Severe calcification| F[Mitral valve replacement]:::action D -->|Very severe<br/>Area < 1.0 cm²| G[Consider urgent intervention]:::urgent ``` ## Key Point: **Balloon mitral valvotomy (BMV)** is the procedure of choice for symptomatic MS with favorable valve anatomy (pliable, non-calcified leaflets, minimal subvalvular disease). It provides immediate hemodynamic relief without the morbidity of surgery. ## High-Yield: - **Indications for intervention in MS:** Symptomatic patients (NYHA Class II–IV) OR asymptomatic with pulmonary hypertension (RVSP >50 mmHg) OR atrial fibrillation - **Valve area thresholds:** Critical stenosis ≤1.5 cm²; severe ≤1.0 cm² - **Anticoagulation:** Essential in ALL MS patients due to high risk of atrial fibrillation and thromboembolism, especially with LA enlargement ## Clinical Pearl: The **opening snap** (early diastolic sound) indicates a pliable mitral valve — a favorable sign for BMV success. Absence or late opening snap suggests calcification and favors surgery. ## Rationale for Correct Answer This patient meets criteria for intervention: symptomatic (dyspnea, orthopnea), moderate-severe stenosis (1.2 cm²), and pulmonary edema despite medical therapy. Anticoagulation is mandatory to prevent thromboembolism given LA enlargement. BMV is the first-line definitive intervention for favorable anatomy and provides rapid symptom relief. ## Why Medical Management Alone Is Insufficient Diuretics and digoxin control symptoms but do NOT address the underlying stenosis. Progressive hemodynamic deterioration and pulmonary hypertension will develop without definitive intervention.