CASQ2 and catecholaminergic polymorphic ventricular tachycardia: In this report, we describe an autosomal recessive form of CPVT that is caused by homozygous or compound heterozygous variants in the CASQ2. To our knowledge, this is the first systematic study of CASQ2 variants in Chinese children, which expands the genetic spectrum of CASQ2‐associated CPVT.