Previously reported individuals harboring disease-causing variants in the trans-2,3-enoyl-CoA reductase-like protein (TECRL) gene have exhibited a mixed phenotype of CPVT and long QT syndrome (LQTS), referred to as type 3 CPVT (CPVT3), an autosomal recessive disorder. The gene discussed is TECRL; the disease is familial long QT syndrome.