Action potential duration(APD) at 30%,50% and 90% repolarization(APD30,APD50,APD90),effective refractory period(ERP),amplitudes of action potential and resting membrane potential were obtained.

• 用充满3mol/L氧化钾的玻璃微电极插入心房肌,记录动作电位。 观察复极30%25、50%25、90%25时的动作电位时程(APD30、APD50、APD90)、有效不应期(ERP)、动作电位振幅(APA)、静息电位(RMP)。