Glycogen glycogen-associated cardiomyopathy [OMIM:602743] is an autosomal dominant GSD caused by mutations in the protein kinase, AMP-activated, noncatalytic, gamma-2 (PRKAG2) gene on chromosome 7q36.1, which is associated with Wolff–Parkinson–White syndrome (WPW) [OMIM:194200]. Here, PRKAG2 is linked to Wolff-Parkinson-White syndrome.