?箋性心律 Sinus rhythm 窦房结发放 在特殊传导组织乃至心肌中以固定方式 SA Node Atrial muscle Internodal conducting Atrial muscle fibers AV node(slow) Purkinje fiber conducting system Ventricular muscleS A N o d e Atrial muscle AV node (slow) Purkinje fiber conducting system Ventricular muscle Internodal conducting fibers Atrial muscle ？窦性心律 Sinus Rhythm 窦房结发放规律的电冲动在特殊传导组织乃至心肌中以固定方式传导