A survey of uncommon forms of coronary arteries.

Among 854 coronary angiograms, we found the following abnormalities of the coronary arteries. Three cases had nonatherosclerotic coronary artery aneurysms. One case, a 27-year-old man with a diffuse lesion, expired after two episodes of myocardial infarction. In 2 other cases the lesions were localized and the patients underwent successful coronary bypass surgery. In 2 cases, a small vascular network was found: a 23-year-old man with pheochromocytoma who also had myocardial injury and pulmonary edema, and a case with contusio cordis who had angina pectoris but had normal coronary arteries. In 3 cases the coronary arteries originated abnormally from the aorta. A congenital right coronary artery-right ventricular fistula was detected in a 17-year-old female with multiple cardiac abnormalities. Abnormally wide coronary arteries were also found in 17 cases with apical hypertrophy, a form of hypertrophic nonobstructive cardiomyopathy.