Mutations (G144D, T305S, R67Q, V227F, R82W) in the KCNJ2 gene were identified in individuals who had the clinical phenotype features of CPVT (Kalscheur et al. 2014; Kimura et al. 2012; Tester et al. 2006). Here, KCNJ2 is linked to catecholaminergic polymorphic ventricular tachycardia.