Anti-KCNH2 Antibody-Induced Long QT Syndrome: Novel Acquired Form of Long QT Syndrome

To the Editor: The acquired form of long QT syndrome (LQTS) is often induced by hypokalemia or drugs. Hypokalemia and drugs cause QT prolongation via reduction in the rapidly activating component of the delayed rectifier K+currents (IKr). Therefore, the KCNH2 (HERG) channel conducting IKris