Junctional premature beat was found in 9 cases,temporary junctional rhythm wasfound in 3 cases.No abnormal rhythm was found in other 3 cases.No temporary or persistentA-V block was found in any cases.

• 其中9例出现交界性早搏，3例出现短暂交界性心律，3例无任何心律异常改变，无1例出现一过性或永久性房室传导阻滞。