Delayed Rectifier Potassium Current: Shaping Cardiac Action Potential
The delayed rectifier potassium current (I(K)) is a voltage-gated potassium current that plays a crucial role in shaping the cardiac action potential. It is activated slowly upon membrane depolarization and helps to repolarize the cell after the action potential peak. I(K) is mediated by the Kv2.1, Kv4.2, and Kv4.3 potassium channels, which form a complex…