In addition to RyR2, few cases of CPVT have been caused by mutations in the genes that encode calsequestrin (CASQ2) and Kir2.1 (KCNJ2) (Priori and Chen, 2011; Pérez-Riera et al., 2018). This evidence concerns the gene KCNJ2 and catecholaminergic polymorphic ventricular tachycardia.