心室晚电位(ventricular late potentials)是出现在 QRS 波群末部或 ST 段的高频低振幅的破碎电活动,近来认为是心室内某些小块肌肉组织延迟除极的结果。由于除极不均匀和传导缓慢,因此心室内存在潜在的折返途径,易产生折返性心律失常,故晚电位 Ventricular late potentials are high frequency, low amplitude electrical activity that occurs at the end of the QRS complex or in the ST segment and has recently been identified as the result of delayed depolarizations of certain small pieces of muscle tissue in the ventricles. Due to the extremely uneven and conduction is very slow, so there is a potential ventricular return route, easy to produce reentrant arrhythmias, so the late potential