Long QT syndrome with a de novo <i>CALM2</i> mutation in a 4‐year‐old boy

Abstract

CALM mutations cause long QT syndrome (LQTS), catecholaminergic polymorphic ventricular tachycardia (CPVT) and idiopathic VF. This patient with a CALM2 p.N98S mutation had both phenotypes of LQTS and CPVT.