A 28-year-old woman with a history of acute rheumatic fever now presents with a new diastolic murmur at the apex, dyspnea at rest, and orthopnea. Echocardiography shows a thickened, immobile mitral valve with a characteristic 'hockey stick' appearance in systole. Which of the following pathologic mechanisms best explains her symptoms?
- A)Impaired left ventricular systolic function
- B)Mitral valve prolapse with leaflet eversion
- C)Endocardial fibroelastosis of the left ventricle
- D)Aortic valve calcification and fibrosis
- E)Restricted mitral valve opening causing elevated left atrial pressureGABARITO
Explicação
Mitral stenosis restricts blood flow from the left atrium to the left ventricle during diastole. The hockey stick appearance represents anterior leaflet restriction. This causes elevated left atrial pressure, leading to pulmonary edema and the symptom complex ... Ver explicação completa e trilha adaptativa →