TTR and familial long QT syndrome: Furthermore, using a NGS panel of 311 genes related to cardiomyopathies/channelopathies, a disease-causing variant was identified in 10 athletes: 6 HCM, 1 Fabry disease; 1 LVNC, 1 LQTS and a pathogenic polymorphism in the transthyretin gene, associated with wild-type transthyretin amyloidosis.