Title: P-227 Ablation of inappropriate sinus tachycardia guided by noncontact mappping
Abstract: The present study investigated the factors of atria1 fibrillation (AF) recurrence in right atria1 appendage paced patients with sick sinus syndrome.Methods: Fifty-six patients (aged 68&10 years; 19 men, 38 women) with sick sinus syndrome who received right appendage pacing were divided into 2 groups: 23 patients without AF (I+II; Rubenstein I or II) and 34 patients with AF (III; Rubenstein III).AF group was subdivided into 2 groups; 20 patients (IIIb) with a paced P wave in both leads II and V1 >130 msec, and the other 14 patients (IIIb).The clinical and electrocardiographic data and the actuarial curve of the paroxysmal AF free interval were compared among each group, and the factors of AF recurrence were analyzed through a logistic regression model.