TTN and left ventricular noncompaction: A total of 14.8% (8 of 54) variants have not been described earlier in other populations and may be specific to LVNC patients in Russia: DSP:p.Gln948LysfsTer29, MYH7:p.Glu632Lys, MYH7:p.Glu497Lys, TTN:p.Gln23676HisfsTer16, ACTN2:p.Ile190Ser, ACTN2: p.Leu70del, ACTN2:p.Leu184Pro, SLC22A5:p.Asp388lfs*11.