Mitral valve prolapse (MVP) and coronary artery ectasia.

A case of isolated ectasia of the entire right coronary artery and mitral valve prolapse is reported. The patient presented with acute inferior myocardial infarction and progressive angina pectoris. The diagnosis of ectasia of the right coronary artery and mitral prolapse was established angiographically. During a two-year follow-up period, the patient has continued to have angina and has suffered a second inferior myocardial infarction. Subsequent angiographic reevaluation has failed to show occlusive coronary lesions. It is suggested that distal thromboembolism due to changes in the character of blood flow in the dilated vessel has been responsible for the two episodes of myocardial infarction and persistent angina pectoris.