Management of conduction abnormalities after transcatheter aortic valve implantation. AF = atrial fibrillation; AV = atrioventricular; AVB = atrioventricular block; BBB = bundle branch block; ECG = electrocardiogram; EPS = electrophysiology study; HV = His–ventricular interval; LBBB = left bundle branch block; LVEF = left ventricular ejection fraction; PM = pacemaker; QRS = Q, R, and S waves; RBBB = right bundle branch block; TAVI = transcatheter aortic valve implantation. ^a24-48 h post-procedure. ^bTransient high-degree AVB, PR prolongation, or axis change. ^cHigh-risk parameters for high-degree AV block in patients with new-onset LBBB include: AF, prolonged PR interval, and LVEF <40%. ^dAmbulatory continuous ECG monitoring for 7 − 30 days. ^eEPS with HV ≥70 ms may be considered positive for permanent pacing. ^fWith no further prolongation of QRS or PR during 48-h observation.