能 动作电位2期 (A0) 20 气会 -20 e等人 -80 0 150 300 Time (ms) 人民只生B版松
动作电位 2 期
能 动作电位3期 % 20 -60 -80 Na a 150 300 Time (ms) 人民只生公版松
动作电位 3 期
显 动作电位4期 (A0) 2 A金 青0 0 150 300 Time (ms) 人只坐B版松
动作电位 4 期
Heterogeneous APs in heart Superior vena cava Phase o SA node Atrium AV node Overshoot Phase 0 mV Purkinje -100 Tricuspid Resting potential valve Mitral vaive Action potential phases 0:Upstroke Ventricle Early-fast repolarization Plateau Repolarization Diastole A1 ECG PR QT 200ms 人凤只公公版松
Heterogeneous APs in heart
SUMMARY OF ECG WAVES,INTERVALS,AND SEGMENTS R P Q S 4 PR ST QT 0.2 0.4 0.6 0.8 Time(sec) ECG COMPONENT REPRESENTS NORMAL DURATION (SEC) P wave Atrial depolarization 0.08-0.10 QRS complex Ventricular depolarization 0.06-0.10 T wave Ventricular repolarization 1 P-R interval Atrial depolarization plus AV nodal delay 0.12-0.20 ST segment Isoelectric period of depolarized ventricles Q-T interval Length of depolarization plus repolarization- 0.20-0.402 corresponds to action potential duration 人凤只生B版松
SUMMARY OF ECG WAVES, INTERVALS, AND SEGMENTS