Coronary artery aneurysm is uncommon and mostly caused by coronary atherosclerosis. Although usually asymptomatic, it may cause catastrophes due to aneurysm rupture, vasospasm, or thromboembolism formation. Coronary artery aneurysm most frequently involves the right coronary artery, followed in frequency by the left circumflex coronary artery and the left anterior descending coronary artery; it rarely involves the left main coronary artery. Herein present two cases with left main coronary artery aneurysm and briefly discuss their treatment.
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