RT Journal Article T1 The prevalence of left and right bundle branch block morphology ventricular tachycardia amongst patients with arrhythmogenic cardiomyopathy and sustained ventricular tachycardia: insights from the European Survey on Arrhythmogenic Cardiomyopathy. A1 Belhassen, Bernard A1 Laredo, Mikael A1 Roudijk, Rob W A1 Peretto, Giovanni A1 Zahavi, Guy A1 Sen-Chowdhry, Srijita A1 Badenco, Nicolas A1 Te Riele, Anneline S J M A1 Sala, Simone A1 Duthoit, Guillaume A1 van Tintelen, J Peter A1 Paglino, Gabriele A1 Sellal, Jean-Marc A1 Gasperetti, Alessio A1 Arbelo, Elena A1 Andorin, Antoine A1 Ninni, Sandro A1 Rollin, Anne A1 Peichl, Petr A1 Waintraub, Xavier A1 Bosman, Laurens P A1 Pierre, Bertrand A1 Nof, Eyal A1 Miles, Chris A1 Tfelt-Hansen, Jacob A1 Protonotarios, Alexandros A1 Giustetto, Carla A1 Sacher, Frederic A1 Hermida, Jean-Sylvain A1 Havranek, Stepan A1 Calo, Leonardo A1 Casado-Arroyo, Ruben A1 Conte, Giulio A1 Letsas, Konstantinos P A1 Zorio, Esther A1 Bermúdez-Jiménez, Francisco J A1 Behr, Elijah R A1 Beinart, Roy A1 Fauchier, Laurent A1 Kautzner, Josef A1 Maury, Philippe A1 Lacroix, Dominique A1 Probst, Vincent A1 Brugada, Josep A1 Duru, Firat A1 de Chillou, Christian A1 Bella, Paolo Della A1 Gandjbakhch, Estelle A1 Hauer, Richard A1 Milman, Anat K1 Arrhythmogenic cardiomyopathy K1 Arrhythmogenic left ventricular cardiomyopathy K1 Arrhythmogenic right ventricular cardiomyopathy/dysplasia K1 European survey K1 Genetics K1 Ventricular tachycardia AB In arrhythmogenic cardiomyopathy (ACM), sustained ventricular tachycardia (VT) typically displays a left bundle branch block (LBBB) morphology while a right bundle branch block (RBBB) morphology is rare. The present study assesses the VT morphology in ACM patients with sustained VT and their clinical and genetic characteristics. Twenty-six centres from 11 European countries provided information on 954 ACM patients who had ≥1 episode of sustained VT spontaneously documented during patients' clinical course. Arrhythmogenic cardiomyopathy was defined according to the 2010 Task Force Criteria, and VT morphology according to the QRS pattern in V1. Overall, 882 (92.5%) patients displayed LBBB-VT alone and 72 (7.5%) RBBB-VT [alone in 42 (4.4%) or in combination with LBBB-VT in 30 (3.1%)]. Male sex prevalence was 79.3%, 88.1%, and 56.7% in the LBBB-VT, RBBB-VT, and LBBB + RBBB-VT groups, respectively (P = 0.007). First RBBB-VT occurred 5 years after the first LBBB-VT (46.5 ± 14.4 vs 41.1 ± 15.8 years, P = 0.011). An implanted cardioverter-defibrillator was more frequently implanted in the RBBB-VT (92.9%) and the LBBB + RBBB-VT groups (90%) than in the LBBB-VT group (68.1%) (P  RBBB-VT accounts for a significant proportion of sustained VTs in ACM. Sex and type of pathogenic mutations were associated with VT type, female sex with LBBB + RBBB-VT, and DSP mutation with RBBB-VT. YR 2022 FD 2022 LK http://hdl.handle.net/10668/19774 UL http://hdl.handle.net/10668/19774 LA en DS RISalud RD Apr 8, 2025