A patient with a history of cardiac arrhythmias is prescribed a medication that increases the duration of the action potential. Which ion channel is most likely affected?
Q1. A patient with a history of cardiac arrhythmias is prescribed a medication that increases the duration of the action potential. Which ion channel is most likely affected?
Answer: Potassium channels in the atrioventricular node
Explanation: Increasing the duration of the action potential is most closely related to the effect of potassium channels, which regulate repolarization.