房颤的每次室性早搏与紧随其后的下一个QRS波之间形成的RR间期多数长而固定,形成室早后的“类代偿间期”。其发生机制为:穿透性与非穿透性的f波均对随后的f波下传产生干扰与影响。在此基础上,室早发生时,将沿房 Atrial fibrillation, each premature ventricular contractions and followed by the next QRS wave formed between the majority of RR interval fixed, the formation of the chamber earlier “type of compensation period ”. Its mechanism is: penetrating and non-penetrating f-wave are on the subsequent f-wave downlink interference and influence. On this basis, the room occurs early when it will be along the room