Incidence and risk factors of post-operative arrhythmias and sudden cardiac death after atrioventricular septal defect (AVSD) correction: Up to 47 years of follow-up

Background: Atrioventricular septal defect (AVSD) has an incidence of 4-5.3 per 10.000 live births and is associated with Down syndrome (DS). Data on arrhythmias and sudden cardiac death (SCD) after AVSD correction is scarce.& para;& para;Aim: To analyse the incidence of post-operative arrhythmias and SCD after AVSD correction and explore risk factors.& para;& para;Methods: This is a retrospective multicenter study including patients after biventricular AVSD correction. Univariate and multivariate analyses were performed to explore risk factors.& para;& para;Results: A total of 415 patients were included with a mean follow-up duration of 9 years (range;