GW28-e1145 The Typing and Radiofrequency Catheter Ablation of Atrioventricular Nodal Reentrant Tachycardia

AVNRT was typed to slow/fast form, fast/slow form, slow/slow form and multiple form depending on the length of AH interval and the conduction sequence of the retrograde atrial activation. Of all the patients with slow/fast form, slow/slow form and 39 patients with fast/slow form in this study, successful ablation was performed at the site between tricuspid annulus (TA) and the orifice of coronary sinus (CSO), the right posterior extension (RPE); in 3 patients with fast/slow form AVNRT, successful ablation was finally achieved at the proximal CS and /or the atrial aspect of the proximal mitral annulus (possibly the left posterior extension, LPE).