RT Journal Article T1 Importance of genotype for risk stratification in arrhythmogenic right ventricular cardiomyopathy using the 2019 ARVC risk calculator. A1 Protonotarios, Alexandros A1 Bariani, Riccardo A1 Cappelletto, Chiara A1 Pavlou, Menelaos A1 García-García, Alba A1 Cipriani, Alberto A1 Protonotarios, Ioannis A1 Rivas, Adrian A1 Wittenberg, Regitze A1 Graziosi, Maddalena A1 Xylouri, Zafeirenia A1 Larrañaga-Moreira, José M A1 de Luca, Antonio A1 Celeghin, Rudy A1 Pilichou, Kalliopi A1 Bakalakos, Athanasios A1 Lopes, Luis Rocha A1 Savvatis, Konstantinos A1 Stolfo, Davide A1 Dal Ferro, Matteo A1 Merlo, Marco A1 Basso, Cristina A1 Freire, Javier Limeres A1 Rodriguez-Palomares, Jose F A1 Kubo, Toru A1 Ripoll-Vera, Tomas A1 Barriales-Villa, Roberto A1 Antoniades, Loizos A1 Mogensen, Jens A1 Garcia-Pavia, Pablo A1 Wahbi, Karim A1 Biagini, Elena A1 Anastasakis, Aris A1 Tsatsopoulou, Adalena A1 Zorio, Esther A1 Gimeno, Juan R A1 Garcia-Pinilla, Jose Manuel A1 Syrris, Petros A1 Sinagra, Gianfranco A1 Bauce, Barbara A1 Elliott, Perry M K1 Arrhythmogenic right ventricular cardiomyopathy K1 Genotype K1 Risk stratification K1 Sudden cardiac death K1 Ventricular arrhythmia AB To study the impact of genotype on the performance of the 2019 risk model for arrhythmogenic right ventricular cardiomyopathy (ARVC). The study cohort comprised 554 patients with a definite diagnosis of ARVC and no history of sustained ventricular arrhythmia (VA). During a median follow-up of 6.0 (3.1,12.5) years, 100 patients (18%) experienced the primary VA outcome (sustained ventricular tachycardia, appropriate implantable cardioverter defibrillator intervention, aborted sudden cardiac arrest, or sudden cardiac death) corresponding to an annual event rate of 2.6% [95% confidence interval (CI) 1.9-3.3]. Risk estimates for VA using the 2019 ARVC risk model showed reasonable discriminative ability but with overestimation of risk. The ARVC risk model was compared in four gene groups: PKP2 (n = 118, 21%); desmoplakin (DSP) (n = 79, 14%); other desmosomal (n = 59, 11%); and gene elusive (n = 160, 29%). Discrimination and calibration were highest for PKP2 and lowest for the gene-elusive group. Univariable analyses revealed the variable performance of individual clinical risk markers in the different gene groups, e.g. right ventricular dimensions and systolic function are significant risk markers in PKP2 but not in DSP patients and the opposite is true for left ventricular systolic function. The 2019 ARVC risk model performs reasonably well in gene-positive ARVC (particularly for PKP2) but is more limited in gene-elusive patients. Genotype should be included in future risk models for ARVC. YR 2022 FD 2022 LK http://hdl.handle.net/10668/19768 UL http://hdl.handle.net/10668/19768 LA en DS RISalud RD Apr 4, 2025