CASQ2 and catecholaminergic polymorphic ventricular tachycardia: Despite pvc’s at peak exercise, there were no genetic variants in genes responsible for CPVT, such as RYR2 and CASQ2. Importantly, we did not observe any signs of cardiac remodeling in any of the carriers of the genetic variant, and the predominant cardiac phenotype linked to the variant was arrhythmic.