부산대학교 도서관

To the Editor, Transcatheter aortic valve implantation (TAVI) has become a safe and minimally invasive alternative to surgical aortic valve replacement, and its indications have expanded to include younger and lower surgical risk patients.1 The development of advanced atrioventricular conduction disorders (AVCD) requiring permanent pacemaker implantation has been reported in 2.3% to 36% of patients, and is one of the major concerns associated with this technique, leading to higher mortality rates.2 Specifically, late-onset AVCD can have fatal consequences. Its highly variable temporal definition hampers the identification of predictive factors. However, the appearance of complete left bundle branch block and baseline atrial fibrillation has been suggested.3,4 We conducted a study to assess whether electrocardiographic (ECG) changes can be predictors of late-onset AVCD requiring permanent pacemaker implantation within the first month after discharge following TAVI. This was a retrospective, observational, and cohort study of consecutive patients treated with TAVI from 2011 through 2022 at a tertiary referral center. We studied sociodemographic variables, atrial fibrillation, prior pacemaker implantation, baseline ECG abnormalities and within 24 hours after implantation, the need for pacemaker implantation during admission and after discharge, survival, and the length of stay. The diagnosis of late-onset AVCD and the indication for pacemaker implantation occurred...