Impaired functional plasma membrane (PM) expression of the hERG K<sup>+</sup>-channel is associated with Long-QT syndrome type-2 (LQT2) and increased risk of cardiac arrhythmia.
Human ether-a-go-go-related gene (hERG; K<sub>v</sub> 11.1) channel inhibition is a widely accepted predictor of cardiac arrhythmia. hERG channel inhibition alone is often insufficient to predict pro-arrhythmic drug effects.
KCNQ1 and KCNH2 are the two most common potassium channel genes causing long QT syndrome (LQTS), an inherited cardiac arrhythmia featured by QT prolongation and increased risks of developing torsade de pointes and sudden death.