Catecholaminergic Polymorphic Ventricular Tachycardia is an inherited arrhythmogenic disorder of myocardial calcium hemostasis, autosomal dominant form and autosomal recessive form of which may be due to mutations in the ryanodine receptor and calmodulin 2 genes, respectively. The gene discussed is CALM2; the disease is catecholaminergic polymorphic ventricular tachycardia.