Glycogen Storage Disease 0, Muscle, also known as muscle glycogen synthase deficiency, is related to glycogen storage disease due to muscle and heart glycogen synthase deficiency and glycogen storage disease 0, liver. An important gene associated with Glycogen Storage Disease 0, Muscle is GYS1 (Glycogen Synthase 1). Affiliated tissues include heart and skin, and related phenotypes are left ventricular hypertrophy and stroke