Prominent Thebesian veins, a rare congenital coronary anomaly presenting as acute myocardial ischemia.

Persistent Thebesian veins with the appearance of multiple coronary artery microfistulas are a rare finding and little is known about their physiologic and clinical features. In addition, few reports have demonstrated the perfusion status of patients with Thebesian veins. We report a 75-year-old woman referred for non-ST-elevation myocardial infarction due to prominent Thebesian veins who displayed a perfusion defect in cardiac magnetic resonance imaging. < This case emphasizes that non-obstructive coronary arterial anomaly can lead to myocardial ischemia with angina symptoms and cardiac enzyme rise. Moreover, it provided the typical angiographic appearance of Thebesian vein network and image of myocardial perfusion defect induced by coronary steal.>.