The Physiology of the Cardiac Muscle—podcast

In this physiology podcast, Dr. Rasha Eldeeb, using the power of Notebook Google LM (an innovative AI tool), details the action potential in a single cardiac muscle fiber, outlining its five phases (depolarization phases 0 and repolarization phases 1-3) and the subsequent mechanical response. It then explains the properties of cardiac muscle, including excitability (absolute and relative refractory periods, super-normal phase), rhythmicity (pacemaker potential and its ionic basis), and contractility (excitation-contraction coupling and influencing factors). Furthermore, the podcast describes cardiac conductivity, focusing on the specialized conduction system and its components. Finally, it addresses abnormalities in impulse initiation and conduction, such as extrasystole, flutter, fibrillation, and heart block.