KCNH2‐T474I [20] and KCNQ1‐Q530* [21] mutations induce long QT syndrome, while MYBPC3‐Q401*, MYBPC3‐Q1259*,[22] MYH7‐R403W,[23] and MYH7‐R719W [24] mutations induce hypertrophic cardiomyopathy. Here, KCNH2 is linked to Prolonged QT interval.