Variants of “T>C” at IVS+2 position changing splice donor site to non‐canonical “GC” have been reported in other genetic diseases, such as in NP2 causing Niemann‐Pick C disease (Verot et al., 2007), and in SCN5A causing progressive cardiac conduction disorder (Schott et al., 1999). This evidence concerns the gene SCN5A and heart conduction disease.