Question:
A 45-year-old male presents with dyspnea, paroxysmal nocturnal dyspnea (PND), and orthopnea. He has a history of left anterolateral thoracotomy performed 20 years ago for similar complaints. What is the most likely diagnosis?
A 45-year-old male presents with dyspnea, paroxysmal nocturnal dyspnea (PND), and orthopnea. He has a history of left anterolateral thoracotomy performed 20 years ago for similar complaints. What is the most likely diagnosis?
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A scar from a Left Anterolateral Thoracotomy in a middle-aged/elderly patient with heart failure symptoms should immediately trigger the suspicion of a prior Closed Mitral Commissurotomy (CMC) for rheumatic mitral stenosis.
Updated On: Sep 3, 2026
- Recurrent PDA
- Mitral restenosis
- Left-sided recurrent pleural effusion
- Chronic constrictive pericarditis
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The Correct Option is B
Solution and Explanation
Concept:
A middle-aged patient presents with classic symptoms of severe left-sided heart failure (dyspnea, PND, orthopnea) and carries a surgical history of a specific approach (left anterolateral thoracotomy) performed two decades prior for identical symptoms.
The clinical task is to connect the historical surgical scar to the natural history and long-term complications of historical treatments for rheumatic valvular heart disease.
Explanation:
• The patient's current symptoms (PND, orthopnea) are textbook manifestations of elevated left atrial pressure leading to pulmonary venous congestion, heavily indicating a mitral valve pathology or left ventricular failure.
• The key to the diagnosis lies entirely in the surgical history: a left anterolateral thoracotomy performed 20 years ago for similar heart failure symptoms.
• In the era before cardiopulmonary bypass and open-heart surgery became routine (or in resource-limited settings 20-30 years ago), the standard surgical treatment for severe Rheumatic Mitral Stenosis was a Closed Mitral Commissurotomy (CMC).
• A CMC is characteristically performed via a left anterolateral thoracotomy approach, through the 4th or 5th intercostal space. The surgeon accesses the mitral valve blindly through the left atrial appendage to mechanically split the fused rheumatic commissures using a dilator.
• While CMC effectively provides excellent symptomatic relief for many years, it does not cure the underlying, progressive rheumatic process.
• It is a well-documented clinical phenomenon that $10$ to $20$ years following a successful closed mitral commissurotomy, the scarred mitral valve leaflets inexorably re-fuse and calcify, leading to Mitral Restenosis. This faithfully reproduces the patient's original symptoms of pulmonary congestion.
• A recurrent PDA (Option A) would have been repaired via a left posterolateral thoracotomy, not anterolateral, and is less likely to present with PND in a 45-year-old without massive right heart failure.
Final Answer:
The history of a left anterolateral thoracotomy decades ago for similar symptoms strongly points to a previous closed mitral commissurotomy, which has now failed due to expected mitral restenosis.
A middle-aged patient presents with classic symptoms of severe left-sided heart failure (dyspnea, PND, orthopnea) and carries a surgical history of a specific approach (left anterolateral thoracotomy) performed two decades prior for identical symptoms.
The clinical task is to connect the historical surgical scar to the natural history and long-term complications of historical treatments for rheumatic valvular heart disease.
Explanation:
• The patient's current symptoms (PND, orthopnea) are textbook manifestations of elevated left atrial pressure leading to pulmonary venous congestion, heavily indicating a mitral valve pathology or left ventricular failure.
• The key to the diagnosis lies entirely in the surgical history: a left anterolateral thoracotomy performed 20 years ago for similar heart failure symptoms.
• In the era before cardiopulmonary bypass and open-heart surgery became routine (or in resource-limited settings 20-30 years ago), the standard surgical treatment for severe Rheumatic Mitral Stenosis was a Closed Mitral Commissurotomy (CMC).
• A CMC is characteristically performed via a left anterolateral thoracotomy approach, through the 4th or 5th intercostal space. The surgeon accesses the mitral valve blindly through the left atrial appendage to mechanically split the fused rheumatic commissures using a dilator.
• While CMC effectively provides excellent symptomatic relief for many years, it does not cure the underlying, progressive rheumatic process.
• It is a well-documented clinical phenomenon that $10$ to $20$ years following a successful closed mitral commissurotomy, the scarred mitral valve leaflets inexorably re-fuse and calcify, leading to Mitral Restenosis. This faithfully reproduces the patient's original symptoms of pulmonary congestion.
• A recurrent PDA (Option A) would have been repaired via a left posterolateral thoracotomy, not anterolateral, and is less likely to present with PND in a 45-year-old without massive right heart failure.
Final Answer:
The history of a left anterolateral thoracotomy decades ago for similar symptoms strongly points to a previous closed mitral commissurotomy, which has now failed due to expected mitral restenosis.
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