tokens: Participants carried variants associated with hypertrophic cardiomyopathy ( N = 24 ) , dilated cardiomyopathy ( N = 29 ) , arrhythmogenic right - ventricular cardiomyopathy ( N = 22 ) , catecholaminergic polymorphic ventricular tachycardia ( N = 4 ) , aortopathies ( N = 1 ) , and long - QT syndrome ( N = 39 ) .