The specialized cardiac conducting system normally ensures synchronous conduction of each sinus impulse from the atria t......

MV1导联示短P—P间期0．84～0．90s，长P—P间期1．60～1．71s，基本上为短P—P间期的2倍，考虑存在二度窦房传导阻滞，呈2：1传导。P—R间期0．22s，存在房室......