Hypertrophic cardiomyopathy caused by filamin-C variants has restrictive and extracardiac features and a distinctive ECG. - de Villiers C; Ormondroyd E; Thomson K; Ormerod JOM; Sarwar R; Waring A; Bagnall RD; Sparrow A; Steeples V; Blair E; Buchan RJ; Bueno-Orovio A; et al. (Heart rhythm, 2026)