RYR2 and Ventricular arrhythmia: Although RYR2 variants are officially linked to ventricular arrhythmias and tachychardias (OMIM 115000 & OMIM 604772), in OMIM entry 180902, there is a reference to reports associating RYR2 variants with catecholaminergic polymorphic ventricular tachycardia, sinoatrial and atrioventricular node dysfunction, atrial arrhythmias, and dilated cardiomyopathy, thus expanding the phenotypic spectrum of RYR2-related diseases.