In addition to variations in the RyR2 gene, other, less common genetic modifications associated with CPVT have been identified, involving genes such as TRDN (603283), the calmodulin gene family CALM1 (114180), CALM2 (114182), and CALM3 (114183), ANK2 (106410), and TECRL (617242) [69]. Here, TECRL is linked to catecholaminergic polymorphic ventricular tachycardia.