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Diffuse multiple coronary arteries to left ventricular fistulas.

Coronary artery to left ventricular fistula is an unusual anatomic anomaly consisting of a communication between one of the coronary arteries and the left ventricle. Only sporadic cases have been published in the literature. Diffuse multiple fistulas involving both left and right coronary arteries are even rarer. This report describes a 60-year-old woman with diffuse multiple fistulas communicating between both coronary arteries and the left ventricle. The patient manifested clinically with exertional angina and myocardial ischemia, as evidenced by a positive stress exercise test, which represents the coronary "steal" phenomenon.