Morady F, Scheinman M M, Winston S A, DiCarlo L A, Davis J C
J Am Coll Cardiol. 1984 Dec;4(6):1283-9. doi: 10.1016/s0735-1097(84)80150-3.
Seventeen patients had atrioventricular (AV) reciprocating tachycardia incorporating an AV bypass tract as the retrograde limb of the tachycardia circuit. High right atrial pacing during tachycardia dissociated the low septal right atrial electrogram in four of seven patients with a left free wall bypass tract, neither of two patients with a right free wall bypass tract, four of six patients with a posteroseptal bypass tract and both patients with an anteroseptal bypass tract. Pacing from the coronary sinus during tachycardia dissociated the atrial electrogram recorded at the os of the coronary sinus in no patient with a left free wall bypass tract, both patients with a right free wall bypass tract, two patients with a posteroseptal bypass tract and one patient with an anteroseptal bypass tract. These findings suggest two distinct inputs to the AV node, with the left-sided input being part of the tachycardia circuit in patients with a left free wall bypass tract and the right-sided input being part of the tachycardia circuit in patients with a right free wall bypass tract. However, in some patients with a septal bypass tract, neither the right- nor the left-sided atrial input appears to be a necessary link in the tachycardia circuit.
17例患者患有房室（AV）折返性心动过速，其中心动过速环路的逆向支包含一条房室旁路。心动过速期间进行高位右心房起搏时，7例左游离壁旁路患者中有4例、2例右游离壁旁路患者中无一例、6例后间隔旁路患者中有4例以及2例前间隔旁路患者的低位间隔右心房电图出现分离。心动过速期间从冠状窦起搏时，左游离壁旁路患者中无一例、2例右游离壁旁路患者、2例后间隔旁路患者以及1例前间隔旁路患者在冠状窦口记录的心房电图出现分离。这些发现提示房室结有两种不同的输入，左侧输入是左游离壁旁路患者心动过速环路的一部分，右侧输入是右游离壁旁路患者心动过速环路的一部分。然而，在一些有间隔旁路的患者中，右侧或左侧心房输入似乎都不是心动过速环路中的必要环节。
