Two weeks after having a mild upper respiratory tract infection, a 14-year-old girl has fever and chest pain. On physicalexamination, her temperature is 37C, pulse is 90/min, respirations are 20/min, and blood pressure is 85/45 mm Hg. A friction rub is audible on auscultation of the chest. A chest radiograph shows pulmonary edema. An echocardiogram shows small vegetations at the closure line of the mitral and aortic valves. An endocardial biopsy shows focal interstitial inflammation with Aschoff nodules and Anichkov cells. Her condition improves over the next month. The representative gross appearance of the disease process 20 years later is shown in the figure. Which of the following additional complications of this illness is most likely to be seen in the patient? (A) Aortic stenosis (B) Constrictive pericarditis (C) Left ventricular aneurysm (D) Mitral valve prolapse (E) Dilated cardiomyopathy