DAVNNT(Dual AVnodalnon-reentranttachycardia)即双房室结非折返性心动过速是相对少见的一种室上性心动过速,最早于1975年由WuD等报道。[定义]DAVNNT是指房室结区存在快慢两条径路,窦性激动可分别经快慢两条径路下传并先后激动 DAVNNT (Dual AVnodal non-reentrant tachycardia) is a relatively rare type of supraventricular nodal reentrant tachycardia, supraventricular tachycardia, first reported in 1975 by WuD et al. [Definition] DAVNNT refers to the atrioventricular node zone there are two paths of speed, sinus stimulation, respectively, by the slow and slow down the path and the two have been excited