KCNJ2 and Andersen-Tawil syndrome: The p. Arg82Trp variant of KCNJ2 had previously been associated to CPVT (Tester et al., 2006), and the p. Arg82Gln variant affecting the same amino acid had been reported several times with ATS or ATS with cardiac phenotype alone (Kimura et al., 2012).