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Coronary arteriography and left ventriculography, performed in a 42-year old patient with unstable angina seven months after a myocardial infarct showed communications from both the left anterior descending and right coronary arteries to the left ventricular chamber. The area of communication corresponded to the site of infarction as established by electrocardiogram and left ventriculogram. Whether this is a congenital or acquired lesion is unclear.
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