正常心电图及常见异常心电图的识别及处理ppt参考课件.ppt

6 心房扑动 心电图特征：P波消失，代之以大小、形态相同、节律规则、快速的连续性锯齿样扑动波（F波）是诊断房扑最重要依据，心房率通常为250～300次/分。 多见于：心脏病病人，包括风湿性心脏病、冠心病、高血压性心脏病、心肌病等。 * * 7 心房颤动 心电图特征：①P波消失，出现形态、振幅、间期完全不一样的心房颤动波（f波）； ②RR间期绝对不等；③频率350～600次/分。 生理情况：正常人在情绪激动、运动或急性酒精中毒时可发生房颤。 常见疾病：常发生于原有心血管疾病者，如风湿性心脏病、冠心病、高血压性心脏病、缩窄性心包炎，感染性心内膜炎等。 * * 8 室性期前收缩 心电图特征：①提早出现的QRS波群，宽大畸形，时限通常0.12秒； ②早搏之前无与其相关的P波；③ST段与T波的方向与QRS主波方向相反；④室性早搏后可见一完全性代偿期。 多见于：冠心病、心肌病、心肌炎、风湿性心脏病、药物中毒、电解质紊乱； 精神紧张、过量烟酒也可诱发室性早搏 * * 室早 * 9 阵发性室性心动过速 心电图特征：①室性早搏连续出现3次以上；②QRS波群呈宽大畸形，时限超过0.12秒；ST-T波方向与QRS波主波方向相反；③心室率100～250次/分，④心律规则或略不规则，即RR间期规整或稍不规整。 多见于：各种器质性心脏病病人，最常见的为冠心病，尤其是心肌梗死；其次是心肌病、心力衰竭、二尖瓣脱垂、心瓣膜病。 * * 10 心室扑动 心电图特征：①各导联无P波；②QRS－T波群无法分辨代之以正弦型的大扑动波，规则、向上与向下的波幅相等；③频率180～250次/分。 多见于：缺血性心脏病。 * * * Speaker抯 Notes: This presentation was prepared by an electrophysiologist for use by Medtronic. It is the intent of this lecture to inform the participants on the complexities of the ICD system, the features available to help troubleshoot patient episodes, and to instill awareness of when an electrophysiologist consult is warranted. * Speaker抯 Notes: This presentation was prepared by an electrophysiologist for use by Medtronic. It is the intent of this lecture to inform the participants on the complexities of the ICD system, the features available to help troubleshoot patient episodes, and to instill awareness of when an electrophysiologist consult is warranted. * Speaker抯 Notes: This presentation was prepared by an electrophysiologist for use by Medtronic. It is the intent of this lecture to inform the participants on the complexities of the ICD system, the features available to help troubleshoot patient episodes, and to instill awareness of when an electrophysiologist consult is warranted. * Speaker抯 Notes: This presentation was prepared by an electrophysiologist for use by Medtronic. It is the intent of this lecture to inform the participants on the complexities of the ICD system, the features available to help troubleshoot patie