Notably, some genes that cause LQTS are the same genes that also cause SQTS (KCNQ1, KCNH2, KCNJ2, CACNA1C, CACNB2, and CACNA2D1), CPVT (CALM1, CALM2, CALM3, TRDN, KCNJ2, SCN5A, ANK2 and TECRL) or BrS (SCN5A) [42,89]. Here, ANK2 is linked to familial long QT syndrome.