Cardiovascular Electrophysiology 4 - Action Potential of the Pacemaker Cells

In this lecture we're going to describe how 'pacemaker' cells can spontaneously depolarize without anything stimulating them externally. Some questions you should be able to answer at the end: 1. How can SA and AV node cells depolarize without being externally stimulated? 2. What are ‘funny channels’? 3. What ions flow through the funny channels? 4. Why does a pacemaker cell only have phase 4, 0, and 3? 5. Compare the action potential of a pacemaker myocyte versus and ventricular myocyte. For more, go to paramedicine.com The full series: Part 0 -    • Cardiac Electrophysiology - 0 Fundamentals   Part 1 -    • Видео   Part 2 -    • Cardiovascular Electrophysiology 2 - Elect...   Part 3 -    • Видео   Part 4 -    • Cardiovascular Electrophysiology 4 - Actio...   Part 5 -    • Cardiovascular Electrophysiology 5 - Anato...   Part 6 -    • Cardiovascular Electrophysiology 6 - Excit...   Part 7 -    • Cardiovascular Electrophysiology 7 - ANS I...   Part 8 -    • 8 Paramedic Pharmacology - Antidysrhythmics