We first used iPSC‐CMs derived from a BrS patient (BrS Line 1) who had unstable ventricular tachycardia and two missense variants in the SCN5A gene (R620H and R811H on each of the two alleles) were identified in this patient (Liang et al., 2016). Here, SCN5A is linked to ventricular tachycardia.