Correlation of supraventricular tachycardia during atrial fibrillation ablation procedure

Abstract

Objective Patients with paroxysmal supraventricular tachycardia (SVT) during atrial fibrillation (AF) ablation were characteristically analyzed. Methods Retrospective analysis was made on 1 484 patients with paroxysmal AF undergoing ablation in Department of Cardiology, Qingchun Compus, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, from January 2016 to June 2018. The patients were divided into two groups according to whether or not they were combined with SVT. The relationship between gender, age, type of AF and SVT was analyzed. At the same time, taking the age of 50 and 65 as the boundary point, the stratified analysis was carried out again.When the mechanism of the patients with SVT was found out, slow path improvement or bypass ablation were performed, and long-term follow-up was carried out. Results There were 41 cases (41/1484, 2.76%) with SVT during AF ablation. Among them, 29 cases were complicated with atrioventricular nodal reentrant tachycardia (AVNRT) and 12 cases with atrioventricular reentrant tachycardia (AVRT) . SVT combined with AF was significantly higher in the female group (25/505) than that in the male group (16/979, 4.95% vs. 1.63%, P 50 (33/1351, 6.02% vs. 2.44%, P=0.016) .Seven hundred and forty one patients were with paroxysmal AF and 743 with persistent AF. The incidence of combined with SVT was significantly higher in patients with paroxysmal AF, compared to those with persistent AF (3.91% vs. 1.62%, P=0.007) . Logistic regression analysis showed that female, at age ≤50 and paroxysmal AF were risk factors for AF combined with SVT (OR=0.292, 95%CI 0.151-0.565, P<0.000; OR=0.301, 95%CI 0.131-0.689, P=0.004; OR=0.456, 95%CI 0.230-0.906, P=0.025) . Conclusion Electrophysiological study should be performed during AF ablation to rule out SVT, especially in younger, female and paroxysmal AF patients. Key words: Atrial fibrillation; Supraventricular tachycardia; Ablation; Gender