QT interval of ECG leadII and EPG and APD 90 , APD 50 by glass microelectrode were measured before and after stimulation.

• 心室复极时程以体表心电图 (ECG)II导联 QT间期、心外膜电图 (EPG)的 QT间期及采用玻璃微电极技术记录的动作电位时程 (APD90 ；APD50 )表示 .