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Patent Granted Deleterious mutations of the ryanodine receptor family, and especially the RYR2 receptor, lead to a constellation of pathologies leading to both acute and chronic heart failure collectively known as "Ryanopathies."[7] Mutations in the RYR2 gene are associated with catecholaminergic polymorphic ventricular tachycardia, stress-induced polymorphic ventricular tachycardia, and arrhythmogenic right ventricular dysplasia.[8] Mice with genetically reduced RYR2 exhibit a lower basal heart rate and fatal arrythmias.[9]