In another study, Akilzhanova et al. tested for variants at common disease-associated RYR2 locus in 35 Kazakhstani patients with ventricular arrhythmia episodes; two had characteristics of CPVT, and 33 patients had monomorphic idiopathic ventricular arrhythmia (75). Here, RYR2 is linked to catecholaminergic polymorphic ventricular tachycardia.