Similar abnormalities of the calcium transient have been previously reported in hiPSC‐CMs derived from patients with CPVT caused by RYR2 variants (Itzhaki et al., 2012; Kujala et al., 2012; Novak et al., 2015). Here, RYR2 is linked to catecholaminergic polymorphic ventricular tachycardia.