Glycogen Storage Disease of Heart, Lethal Congenital, also known as lethal congenital glycogen storage disease of heart, is related to fatal congenital hypertrophic cardiomyopathy due to glycogen storage disease. An important gene associated with Glycogen Storage Disease of Heart, Lethal Congenital is PRKAG2 (Protein Kinase AMP-Activated Non-Catalytic Subunit Gamma 2). Affiliated tissues include heart and kidney, and related phenotypes are increased myocardial glycogen content and congestive heart failure