浅支先分出左心房支布于左心房，主干分支分布左心室的左缘壁和隔壁及右心室隔壁的部分；

The superficial branch (circumflex branch) gives off branches to the left atrium, lateral and diaphragm wall of the left ventricle and part diaphragm wall of the right ventricle.

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患者均进行了三腔双心室同步起搏，起搏电极导线分别置于右心房、右心室以及经由冠状静脉窦置于一支心脏静脉起搏左心室。

All of them received three chamber biventricular pacing and the left ventricular pacing lead was inserted into a cardiac vein through coronary sinus.

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