Ramos Alexandra, Brizida Luís, Carvalho Ramiro, Matias Fernando, Mourão Luís
Serviço de Cardiologia, Hospital Curry Cabral, Lisboa, Portugal.
Rev Port Cardiol. 2010 Jul-Aug;29(7-8):1245-51.
Origin of the left coronary artery from the ostium or proximal segment of the right coronary artery (single coronary artery) is a rare congenital anomaly (0.03 to 0.4%) and an unusual angiographic finding (0.6 to 1.3%). The most common congenital anomaly is separate origin of the left anterior descending artery and circumflex artery from the left coronary sinus. The second most common anomaly is the origin of the circumflex artery from the right coronary sinus. We present a patient with acute inferior myocardial infarction and cardiogenic shock, in whom it was not possible to perform catheterization of the left coronary artery because of the absence of the ostium of the left coronary sinus. Multislice computed tomography of the coronary arteries was the tool that enabled us to visualize the origin and course of the left coronary artery.
左冠状动脉起源于右冠状动脉开口或近端节段（单冠状动脉）是一种罕见的先天性异常（0.03%至0.4%）和不常见的血管造影表现（0.6%至1.3%）。最常见的先天性异常是左前降支和回旋支分别起源于左冠状窦。第二常见的异常是回旋支起源于右冠状窦。我们报告一名患有急性下壁心肌梗死和心源性休克的患者，由于左冠状窦开口缺失，无法对左冠状动脉进行导管插入术。冠状动脉多层计算机断层扫描是使我们能够观察左冠状动脉起源和走行的工具。
