KCNQ1(redirected from LQT)
Also found in: Acronyms.
KCNQ1A gene on chromosome 11p15.5 that encodes a voltage-gated potassium channel required for the repolarisation phase of the cardiac action potential. The KCNQ1 gene product can form heteromultimers with two other potassium channel proteins, KCNE1 and KCNE3.
KCNQ1 mutations are associated with hereditary long QT syndrome/Romano-Ward syndrome, Jervell and Lange-Nielsen syndrome and familial atrial fibrillation.