A 67 year old man is hospitalized for an acute transmural myocardial infarction. Two days later, he develops sudden pulmonary edema and hypotension. Examination shows a new holosystolic murmur best heard at the apex and radiating to the axilla. Which of the following is the most likely cause of this acute valvular complication?
- A)Myxomatous degeneration of the posterior leaflet
- B)Rupture of the posteromedial papillary muscleGABARITO
- C)Calcification of the mitral annulus
- D)Fibrosis of the chordae after rheumatic fever
- E)Vegetation on the tricuspid valve
Explicação
Papillary muscle rupture is a classic mechanical complication occurring several days after myocardial infarction and causes acute severe mitral regurgitation. The posteromedial papillary muscle is especially vulnerable because it has a single blood supply. Sud... Ver explicação completa e trilha adaptativa →