ECG01---Basic-Principles课件.ppt

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Basic Principles,1,2,3,5,6,7,8,10,心脏细胞的极化状态,细胞静止状态处于极化状态，胞内是负电荷，胞外正电荷,静止期心脏细胞的电极化状态由细胞膜泵维持，泵需要不断地提供能量,12,起搏细胞,(,A),起搏细胞的自动除极,(,B),单一的动作电位,随着每次自动除极，产生新的动作电位，依次刺激邻近的细胞除极，直至整个心脏都除极。,14,起搏细胞,（,A）,窦房结频率为60100次/分，产生规则的、连续的动作电位,（,B）,每个动作电位都始发一个将传导至整个心脏的除极波,15,电传导细胞,电传导细胞是细长的，像电路中的电线一样，这些细胞携带电流快速而有效地达到心脏的远处部位。,16,心肌细胞,（A）,一个静止的心肌细胞,（,B）,一个除极的收缩的心肌细胞,17,正常窦性心律,Click heart to view animation,*,Animation,18,心房除极,20,房室结延搁作用,21,浦肯野系统的传导,23,心室除极,24,快速复极末期(3期),26,正常,EKG,活动,27,28,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,