Multiple Choice Question of the Week : Echo-05 : [Answer]


75-year-old woman, hospitalized for NSTEMI. During hospitalization, the patient developed acute dyspnea.

What happened to the mitral valve?

A) large vegetation on the valve
B) papillary muscle rupture
C) rupture of the chordae tendineae
D) cardiac myxoma

Right answer is: B) papillary muscle rupture

This is a case of acute ischaemic mitral regurgitation due to rupture of the papillary muscle. Specifically, the rupture affects the posterior papillary muscle.

Indeed, this is more common rupture because the posterior papillary muscle is supplied by a single coronary artery, the right coronary artery.

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