Cardiomyopathy Gene Variants and Polygenic Risk Scores in Atrial Fibrillation: Evidence for an Atrial-First Phenotype. - da Rocha GL; Feiner J; Lazarte J; Pang K; Li Y; Le A; Man A; Pathan N; Whitlock RP; Belley-Côté EP; Conen D; Wong JA; et al. (Journal of the American College of Cardiology, 2026)