RYR2 and catecholaminergic polymorphic ventricular tachycardia: Targeted genetic testing includes the three genes linked to long QT syndrome (LQTS), namely KCNQ1, KCNH2, and SCN5A, the latter also causing Brugada syndrome (BrS), in addition to the RYR2 gene, which is linked to catecholaminergic polymorphic ventricular tachycardia (CPVT) [12].