Скачать или смотреть Reentry EXPLAINED: Electrophysiology, Mechanisms & Unidirectional Block (Beginner’s Guide)

⚡ Reentry Arrhythmias: Electrophysiology, Mechanisms & Unidirectional Block Explained
Reentry is a key mechanism of many cardiac arrhythmias, including AVNRT, AVRT, atrial flutter, and ventricular tachycardia. But what exactly causes reentrant circuits, and how do factors like unidirectional block and excitable gap contribute? In this video, we break down the electrophysiology of reentry arrhythmias, covering anatomical and functional reentry mechanisms, and discuss their clinical significance for medical students, USMLE prep, and cardiology professionals.

What You’ll Learn in This Video:
✔️ What is Reentry? Electrophysiological basis of arrhythmias
✔️ Anatomical vs. Functional Reentry: Key differences and clinical examples
✔️ Unidirectional Block & Excitable Gap: How they enable reentrant circuits
✔️ Common Reentrant Arrhythmias: AVNRT, AVRT, Atrial Flutter, WPW Syndrome
✔️ Antiarrhythmic Drugs & Reentry: Class I & III drug effects on refractory periods
✔️ High-yield mnemonics & USMLE exam pearls

⏰ Timestamps for Easy Navigation:
00:00 Introduction
00:25 Normal impulse propagation
01:25 Reentry ring model
02:05 3 basic electrophysiological properties. Unidirectional block.
03:21 Wavelength and excitable gap
06:28 Slow conduction
09:02 Impedance match
09:17 Safety factor for conduction
12:39 Post-repolarization refractoriness
14:34 Anisotropic conduction (uniform and non-uniform)
17:02 Unidirectional conduction block types
19:39 Premature contraction as requirement for reentry initiation
23:46 Recovery of excitability in reentry circuit (Effective refractory period)
24:41 Reentry classification (anatomical and functional)
25:44 Leading circle reentry

💡 Engage With Us:
Question for You: Which reentrant arrhythmia do you find most difficult to understand? Drop your thoughts in the comments!
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