But in lead aVR, the main QRS complex is upright and forms the type of Rs, and the Twave is inverted without any exception. There is a large notch on the upstroke of S wave without any excep-tion.

• aVR导联,QRS波群主波向上,形成Rs型,T波倒置,与主波方向相反(无一例外),也与人类aVR导联的波形相反。