Loud S1 with a diastolic rumble at the apex is most consistent with which lesion?

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Multiple Choice

Loud S1 with a diastolic rumble at the apex is most consistent with which lesion?

The main idea here is recognizing auscultatory signs that point to mitral stenosis. A loud first heart sound occurs with mitral stenosis because the stiff, thickened mitral leaflets close with more force at the start of systole. The diastolic rumble heard at the apex reflects turbulent flow across a narrowed mitral valve during diastole as blood moves from the left atrium to the left ventricle. This low-pitched rumble is best heard with the patient in the left lateral decubitus position, at the apex, and is often accompanied by an opening snap after S2 in rheumatic disease. Other lesions don’t produce this exact combination. Tricuspid regurgitation causes a holosystolic murmur best at the left sternal border; aortic regurgitation causes an early diastolic decrescendo murmur along the left sternal border; pulmonary hypertension typically features a loud P2 and right-sided signs, not a diastolic apical rumble.

The main idea here is recognizing auscultatory signs that point to mitral stenosis. A loud first heart sound occurs with mitral stenosis because the stiff, thickened mitral leaflets close with more force at the start of systole. The diastolic rumble heard at the apex reflects turbulent flow across a narrowed mitral valve during diastole as blood moves from the left atrium to the left ventricle. This low-pitched rumble is best heard with the patient in the left lateral decubitus position, at the apex, and is often accompanied by an opening snap after S2 in rheumatic disease.

Other lesions don’t produce this exact combination. Tricuspid regurgitation causes a holosystolic murmur best at the left sternal border; aortic regurgitation causes an early diastolic decrescendo murmur along the left sternal border; pulmonary hypertension typically features a loud P2 and right-sided signs, not a diastolic apical rumble.

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