accrochage

ac·cro·chage

(ak-rō-shahzh'), Intermittent synchronization of two different rhythms of the heart with one influencing the behavior of the other when neither is dominant; seen in cases of atrioventricular dissociation when an atrial beat falls shortly after a ventricular beat, the latter causing the atrial beat to occur sooner than expected. [Fr. hooking, hitching]