A key hemodynamic consequence of papillary muscle rupture is which of the following?

A key hemodynamic consequence of papillary muscle rupture is which of the following?

• A. Acute mitral regurgitation causing hypotension and pulmonary edema
• B. Chronic aortic regurgitation without symptoms
• C. Isolated systolic hypertension
• D. Atrial fibrillation without hemodynamic impact

Answer: (A)

When a papillary muscle ruptures, the mitral valve loses its point of tethering, so the leaflets can no longer coapt properly. This creates acute, severe mitral regurgitation, where blood is blasted backward into the left atrium during systole. The sudden backflow dramatically raises left atrial pressure and reduces forward flow into the aorta, leading to low systemic blood pressure and pulmonary edema. This is a life-threatening, rapid-onset problem that often occurs after a myocardial infarction and requires urgent management. Other options describe valvular or rhythm problems that do not produce this abrupt hemodynamic crash. Chronic aortic regurgitation is a different process with gradual changes, isolated systolic hypertension isn’t driven by this mechanism, and atrial fibrillation without hemodynamic impact doesn’t explain the acute, pump-compromise scenario seen with papillary muscle rupture.

When a papillary muscle ruptures, the mitral valve loses its point of tethering, so the leaflets can no longer coapt properly. This creates acute, severe mitral regurgitation, where blood is blasted backward into the left atrium during systole. The sudden backflow dramatically raises left atrial pressure and reduces forward flow into the aorta, leading to low systemic blood pressure and pulmonary edema. This is a life-threatening, rapid-onset problem that often occurs after a myocardial infarction and requires urgent management.

Other options describe valvular or rhythm problems that do not produce this abrupt hemodynamic crash. Chronic aortic regurgitation is a different process with gradual changes, isolated systolic hypertension isn’t driven by this mechanism, and atrial fibrillation without hemodynamic impact doesn’t explain the acute, pump-compromise scenario seen with papillary muscle rupture.