Action Potential Through the Heart: Contractile Cardiomyocytes

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Join us in this captivating video as we delve into the fascinating world of cardiac myocytes. Learn how action potentials are initiated in cardiac myocytes, also known as cardiomyocytes or cardiac muscle cells, and explore the intricate processes that contribute to the heart's pumping action. In this video, we will examine the five phases of an action potential waveform in cardiac myocytes (depolarization, initial repolarization, plateau, repolarization, and resting membrane potential). We will take a deep dive into the ion channels and the ions involved in each of the phases of the cycle. We also compare the action potential waveforms in cardiomyocytes with that of pacemaker cells. Prepare to be captivated by the electrifying wonders of the heart's rhythm.
00:04 - Intro
00:22 - Contractile Cardiomyocytes
01:10 - Action Potential Graph in Cardiomyocytes
01:32 - Phase 0: Depolarization
02:17 - Phase 1: Initial Repolarization
02:52 - Phase 2: Plateau
03:53 - Phase 3: Rapid Repolarization
04:24 - Phase 4: Resting
05:10 - Cardiomyocytes vs Pacemakers
06:49 - Comprehension Question