A 58 year old woman presents with progressive fatigue and dyspnea on exertion. She has a history of remote rheumatic fever. Cardiac examination shows a blowing holosystolic murmur best heard at the apex with radiation to the axilla. Echocardiography shows left atrial dilation and eccentric left ventricular hypertrophy. Which of the following best explains the ventricular remodeling seen in this patient?
- A)Right ventricular pressure overload from pulmonary stenosis
- B)Volume overload during ventricular systoleGABARITO
- C)Decreased coronary perfusion during diastole only
- D)Pressure overload from fixed outflow obstruction
- E)Severe reduction in preload from impaired venous return
Explicação
Mitral regurgitation causes chronic volume overload because part of the stroke volume is ejected backward into the left atrium during systole and then returns to the ventricle during diastole. Over time, this leads to left atrial dilation and eccentric left ve... Ver explicação completa e trilha adaptativa →