心肌正常电生理 Resting membrane potential,RMP ·Action potential,AP Action potential duration,APD 0mV Na+ max 0 100ms 3K+ APD -85mV 4◼ ▪ Resting membrane potential ，RMP ▪ Action potential， AP ▪ Action potential duration, APD Pump 100ms 0mV -85mV 0 1 2 3 4 心肌正常电生理 V max Na + K + K+ APD