NEET PG clinical case walkthrough: a young woman presents with palpitations, exertional dyspnea, and a history of rheumatic fever. Step-by-step diagnosis and management of mitral stenosis with MCQs.
Version 1.0 — Published April 2026
A 22-year-old woman presents to the cardiology OPD with complaints of palpitations and breathlessness on exertion for the past 6 months. She reports that climbing two flights of stairs now leaves her winded — something she could do without difficulty a year ago. She also describes episodes of rapid heartbeat lasting 10-15 minutes, occurring 2-3 times per week. She denies chest pain, syncope, or orthopnea. She has no prior surgical history and takes no medications.
On specific questioning, she recalls being hospitalized at age 8 for joint pains and fever that lasted 3 weeks. She was told she had "a heart problem" and was given monthly injections for several years, which she discontinued at age 15.
Rheumatic fever in childhood is the single most important clue in this vignette. In India, rheumatic heart disease (RHD) remains the dominant cause of acquired valvular disease in young adults, affecting an estimated 1.5-2 million people (Indian Council of Medical Research, 2019 registry data). The childhood illness with joint pains and monthly injections (benzathine penicillin prophylaxis) strongly points to a prior episode of acute rheumatic fever.
General examination:
Cardiovascular examination:
Respiratory examination: Bilateral basal fine crepitations, suggesting early pulmonary congestion.
Mitral stenosis is the clinical anchor, but the differential for a young woman with palpitations and exertional dyspnea includes:
| Diagnosis | Points in favor | Points against |
|---|---|---|
| Mitral stenosis (RHD) | History of rheumatic fever, mid-diastolic murmur, loud S1, opening snap, malar flush |
This content is for educational purposes for NEET PG exam preparation. It is not a substitute for professional medical advice, diagnosis, or treatment. Clinical information has been reviewed by qualified medical professionals.
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| None — all findings consistent |
| Left atrial myxoma | Can mimic mitral stenosis with a diastolic murmur, constitutional symptoms | No fever, no positional variation of murmur described |
| Cor triatriatum | Membrane in left atrium mimics MS hemodynamically | Extremely rare, usually presents in childhood |
| Severe mitral regurgitation | Palpitations, dyspnea in a young patient with RHD | Murmur is pansystolic, not diastolic; apex beat would be displaced and hyperdynamic |
| Thyrotoxicosis | Palpitations, AF in a young woman | No weight loss, tremor, or goitre; murmur pattern not explained |
The combination of rheumatic fever history + mid-diastolic murmur + loud S1 + opening snap is essentially pathognomonic for rheumatic mitral stenosis. No further differential workup is needed before proceeding to echocardiography.
Transthoracic echocardiography (TTE) is the investigation of choice for confirming and grading mitral stenosis.
Findings in this patient:
ECG findings:
Chest X-ray findings:
Severe rheumatic mitral stenosis (MVA 0.9 cm2) with atrial fibrillation and moderate pulmonary hypertension.
Severity grading of mitral stenosis by valve area (ACC/AHA 2020 guidelines):
| Parameter | Mild | Moderate | Severe |
|---|---|---|---|
| Mitral valve area | > 1.5 cm2 | 1.0-1.5 cm2 | < 1.0 cm2 |
| Mean gradient | < 5 mmHg | 5-10 mmHg | > 10 mmHg |
| PA systolic pressure | < 30 mmHg | 30-50 mmHg | > 50 mmHg |
Management of mitral stenosis follows two tracks: medical therapy (symptom control and prevention of complications) and definitive intervention (mechanical relief of obstruction).
Balloon mitral valvotomy (BMV) / Percutaneous transvenous mitral commissurotomy (PTMC):
Mitral valve replacement (MVR):
For this patient: Wilkins score 7/16, no significant MR, no LA thrombus — she is an excellent candidate for BMV. TEE must be done before the procedure to definitively exclude LA thrombus.
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Mitral stenosis is tested in NEET PG through three dominant patterns:
Pattern 1 — The clinical vignette: A young woman (15-30 years) with palpitations, dyspnea, and a history of childhood joint pains. The stem describes auscultatory findings. You must identify the murmur timing (diastolic, not systolic) and the associated findings (loud S1, opening snap). The trap: confusing the diastolic murmur of MS with the diastolic murmur of aortic regurgitation (early diastolic, decrescendo, at the left sternal border).
Pattern 2 — The echo question: Given valve area and gradient, classify severity. Or given the Wilkins score components, decide BMV vs MVR. Key numbers to memorize: severe MS < 1.0 cm2, moderate 1.0-1.5 cm2, Wilkins cutoff 8.
Pattern 3 — The management question: When to anticoagulate (any MS + AF = warfarin, NOT NOACs), when to do BMV vs MVR, and what secondary prophylaxis to continue.
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Start Free Practice →Rheumatic heart disease accounts for over 95% of mitral stenosis cases in India. The initial streptococcal pharyngitis triggers an autoimmune response (molecular mimicry) that damages the mitral valve, with clinical valve disease appearing 10-20 years after the acute episode. This contrasts with the West, where degenerative calcific stenosis is increasingly common.
The mid-diastolic rumbling murmur with presystolic accentuation (in sinus rhythm) heard best at the apex with the bell of the stethoscope in the left lateral decubitus position. The opening snap heard after S2 is also characteristic — a shorter S2-OS interval indicates more severe stenosis because higher left atrial pressure opens the valve earlier.
A mitral valve area below 1.0 cm2 indicates severe stenosis. Normal mitral valve area is 4-6 cm2. Moderate stenosis is 1.0-1.5 cm2, and mild stenosis is 1.5-2.0 cm2. Symptoms typically begin when the valve area falls below 2.0 cm2. These cutoffs are directly tested in NEET PG echo interpretation questions.
BMV is preferred when the valve is pliable (Wilkins score 8 or below out of 16), there is no significant mitral regurgitation, no left atrial thrombus on transesophageal echo, and commissural fusion is the dominant pathology. A Wilkins score above 8 suggests extensive calcification and subvalvular disease, making surgical replacement (MVR) the better option.
Chronic pressure overload from mitral stenosis causes left atrial dilatation and fibrosis, which disrupts normal atrial conduction pathways. Atrial fibrillation develops in 30-40% of patients with significant mitral stenosis. It worsens symptoms because loss of the atrial kick reduces cardiac output by 15-25%, and the rapid ventricular rate shortens diastolic filling time across the stenotic valve.
NBE tests mitral stenosis through three patterns: clinical vignettes with classic auscultatory findings (mid-diastolic murmur, loud S1, opening snap), echo interpretation (commissural fusion, valve area, Wilkins score), and management decisions (BMV vs MVR indications). The most common trap is confusing mitral stenosis murmur timing (diastolic) with mitral regurgitation (pansystolic). Expect 1-2 questions per paper from valvular heart disease.
This content is for educational purposes for NEET PG exam preparation. It is not a substitute for professional medical advice, diagnosis, or treatment. Clinical information has been reviewed by qualified medical professionals.
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Written by: NEETPGAI Editorial Team Reviewed by: Pending SME Review Last reviewed: April 2026
This article is reviewed by qualified medical professionals for clinical accuracy and exam relevance. For corrections or updates, contact the editorial team.