Two men, aged 29 and 44, presented with clinical and electrocardiographic evidence suggesting impending myocardial infarction. Selective coronary angiography revealed serious obstructive coronary atherosclerosis including gross stenosis of the main left coronary artery in both. Emergency surgical operations were performed, a double aorto-coronary venous bypass in one and a single venous bypass combined with a Vineberg operation in the other. Neither patient sustained myocardial infarction. Both patients are very well more than six months after operation. Clinical, electrocardiographic and angiographic evidence of the effectiveness of these operations is presented.
