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心律失常过早搏动过早搏动(prematurebeat)期前收缩(extrasystole)过早搏动(prematurebeat)期前收缩(extrasystole)房性早搏房性早搏(atrialprematurebeat)5.联律间期【从前一正常窦性P波起至房性P′开始的距离】大多固定。房性早搏(atrialprematurebeat)房性早搏(atrialprematurebeat)房性早搏(atrialprematurebeat)房性早搏(atrialprematurebeat)房性早搏(atrialprematurebeat)房性早搏(atrialprematurebeat)交界性早搏(prematureatrioventricularjunctionalbeat)交界性早搏(prematureatrioventricularjunctionalbeat)交界性早搏(prematureatrioventricularjunctionalbeat)交界性早搏(prematureatrioventricularjunctionalbeat)交界性早搏(prematureatrioventricularjunctionalbeat)过早搏动过早搏动(prematurebeat)期前收缩(extrasystole)过早搏动(prematurebeat)期前收缩(extrasystole)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏分类室性早搏分类室性早搏分类室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)室性早搏(prematureventricularbeats)根据起源部位不同而分类:———————————————————————————————————————表—1室性早搏定位诊断:心电图表现I、aVLII、III、aVFV1V5———————————————————————————————————————右室上部上下上类似RBBB下部下下上类似LBBB右束支上上下上呈LBBB左束支主干上上上上呈RBBB左前分支上下上上RBBB+LPH左后分支下上上上RBBB+LAH前壁下下室后壁上上侧壁上下室间隔与窦性QRS—T波形大同小异———————————————————————————————————————注:上:指QRS主波向上下:指QRS主波向下1.起源于右心室早搏:2.起源于左心室早搏:3.起源于间隔部的室性早搏:4.起源于心尖部的室性早搏5.起源于心底部的室性早搏6.起源于心室前壁的室性早搏:7.起源于心室后壁的室性期前收缩窦性早搏房性早搏(atrialprematurebeat)交界性早搏(prematureatrioventricularjunctionalbeat)交界性早搏(prematureatrioventricularjunctionalbeat)室性早搏(prematureventricularbeats)谢谢