Introduction: Mechanisms underlying cardiac arrhythmias are typically driven by abnormalities in cardiac conduction and/or heterogeneities in repolarization time (RT) across the heart. While conduction slowing can be caused by either electrophysiological defects or physical blockade in cardiac tissue. RT heterogeneities are mainly related to action potential (AP) prolongation or abbre... https://www.socialstudiesscholar.com/