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The Journal of Thoracic and Cardiovascular Surgery, Vol 78, 614-622, Copyright © 1979 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Variant angina. Clinical spectrum and results of medical and surgical therapy

RC Pasternak, AM Hutter Jr, RW DeSanctis, MF JaRo and MJ Buckley

Fifty-four patients with variant angina are described. They are divided into patients without hemodynamically (less than 50%) important coronary artery lesions (Group 1), patients with intermediate (greater than or equal to 50% and less than 90%) fixed obstruction (Group 2A), and patients with high grade (greater than or equal to 90%) fixed obstruction (Group 2B). Inferior ischemia occurred significantly more often in Group 1 (90% versus 33%. p less than 0.001), and exertional angina was more frequent in Group 2 (70% versus 36%, p less than 0.05). Maximum medical therapy with propranolol and nitrates failed to control angina in 55% of Group 1, 69% of Group 2A, and 63% of Group 2B. Twelve patients underwent intra-aortic balloon pumping (IABP), and in 10 there was complete control of variant angina. A total of 35 Group I patients underwent coronary artery bypass grafting (CABG), with a 2.9% mortality rate in patients without preoperative cardiogenic shock. Of these patients, 55% in Group 2A and 73% in Group 2B experienced marked improvement in their angina status. Therefore, we currently recommend bypass grafting for medically intractable variant angina in those patients with severely stenotic, fixed atherosclerotic lesions.

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