The structural characteristics of the Kv11.1 (human ether‐a‐go‐go‐related gene [hERG]) channel, responsible for the delayed rectifier K+ current IKr, make it a common target for a variety of drugs which frequently results in unintended cardiac side effects, such as the TdP arrhythmias (Perry, Sanguinetti, & Mitcheson, 2010; Sanguinetti & Tristani‐Firouzi, 2006). Here, KCNH2 is linked to torsades de pointes.