We present the clinical and angiographic profile of three patients with class I stable angina pectoris. All had strong coronary risk factors, and stress testing was positive in stage one of the Bruce protocol. Coronary angiography revealed total occlusion of the left main coronary artery (LMCA), and aortocoronary bypass surgery was performed. Thus, total LMCA occlusion may be an unexpected angiographic finding in patients with class I angina.
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