Chronic moderate to severe MS commonly causes?

Chronic moderate to severe MS commonly causes?

• A. CHF
• B. MI
• C. Aortic Regurgitation
• D. Pulmonary Embolism

Answer: (A)

Chronic moderate to severe mitral stenosis raises the pressure in the left atrium because the narrowed valve impedes blood flow into the ventricle. That high left atrial pressure backs up into the pulmonary veins, causing pulmonary venous congestion and, over time, pulmonary hypertension. The result is reduced forward flow and fluid accumulation, leading to symptoms of heart failure with both pulmonary and systemic signs—i.e., congestive heart failure. This sequence explains why congestive heart failure is the typical chronic consequence of mitral stenosis. MI isn’t a direct chronic outcome of MS; it’s an acute coronary event unrelated to the hemodynamic consequences of a stenotic mitral valve. Aortic regurgitation isn’t caused by MS and isn’t a common downstream consequence. Pulmonary embolism isn’t a typical chronic outcome either; MS does increase the risk of atrial fibrillation and systemic thromboembolism, but these more often cause strokes or peripheral emboli rather than a pulmonary embolism.

Chronic moderate to severe mitral stenosis raises the pressure in the left atrium because the narrowed valve impedes blood flow into the ventricle. That high left atrial pressure backs up into the pulmonary veins, causing pulmonary venous congestion and, over time, pulmonary hypertension. The result is reduced forward flow and fluid accumulation, leading to symptoms of heart failure with both pulmonary and systemic signs—i.e., congestive heart failure. This sequence explains why congestive heart failure is the typical chronic consequence of mitral stenosis.

MI isn’t a direct chronic outcome of MS; it’s an acute coronary event unrelated to the hemodynamic consequences of a stenotic mitral valve. Aortic regurgitation isn’t caused by MS and isn’t a common downstream consequence. Pulmonary embolism isn’t a typical chronic outcome either; MS does increase the risk of atrial fibrillation and systemic thromboembolism, but these more often cause strokes or peripheral emboli rather than a pulmonary embolism.