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１特殊的传导系统细胞 心动周期中所发生的电生理现象使心房支心室的收缩与舒张相互协调，而有一些肌细胞能产生并传导电冲动，从而导致心肌收缩，它们被称之为传导系统。在正常的心脏中，传导系统的细胞是相互联接的，因此产生于某一点位的电冲动可以传导至整个系统（参见图１
A special conduction system cells electrophysiological phenomena occur during the cardiac cycle so that atrial systolic and diastolic ventricular contraction and coordination, and some muscle cells can produce and conduct electrical impulses, resulting in myocardial contraction, which is called the conduction system . In a normal heart, the cells of the conduction system are interconnected, so electrical impulses generated at a certain point can be conducted to the entire system (see FIG. 1