正常情况下,冠状动脉及其分支走行于心外膜下心肌表面。当冠状动脉或其分支的某个节段行走于室壁心肌纤维之间,被形似桥的心肌纤维覆盖,在心脏收缩时出现暂时性管腔狭窄甚至闭塞,则被心肌纤维覆盖的动脉段称为壁冠状动脉,这段心肌纤维称为冠状动脉心肌桥(简称心肌桥,myocardial Under normal circumstances, coronary artery and its branches in the epicardial myocardial surface. When the coronary artery or a branch of its walking in the myocardial wall between the myocardial fibers, the bridge is covered by the myocardial fibers covered in the contraction of the heart when there is temporary lumen stricture or occlusion, was covered by myocardial fiber artery segment said For the wall coronary artery, this myocardial fiber called the coronary myocardial bridge (referred to as myocardial bridge, myocardial