The mechanism,their expression and the principles of electrical treatment for bradycardia,tachycardia and fatal arrhythmia -ventricular fibrillation (VF) are introduced respectively.

• 分别对心动过缓、心动过速以及致命的心律失常_室颤的发病机理、表现形式及电治疗的原理作了扼要的介绍。