These included: (1) LQTS detection and subtype classification (KCNQ1 vs KCNH2 variants), (2) left ventricular ejection fraction estimation (classification tasks: LVEF ≤40% and <50% and regression tasks), and (3) 5-year de novo atrial fibrillation risk prediction from sinus rhythm ECGs (iAF5). Here, KCNH2 is linked to familial long QT syndrome.