To the Editor: We have recently encountered a patient in whom life-threatening coronary spasm during coronary-artery bypass grafting (CABG) was reversed by the sublingual administration of nifedipine (Procardia). Ten years before this event, at the age of 50, the patient had an anteroseptal myocardial infarction. Nine years later he had unstable angina that was refractory to beta-blockade and nitrate therapy and required stabilization with intra-aortic ballon counterpulsation. The patient underwent uncomplicated emergency three-vessel CABG for a 100 per cent lesion of the left anterior descending coronary artery, a 100 per cent lesion of the distal right coronary arteries, and a.
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