Скачать или смотреть Physiology of the Conduction System. What Accounts for PR Segment. Why T Wave is Upright Deflection.

This lecture starts by discussing how the cardiac skeleton separates the atria from the ventricles. It then explains how the AV node serves as a link between atrial and ventricular muscle. Next it explains how AV node fibers generate, propagate, and pass potentials. It then discusses what causes the PR segment and how the AV node can serve as a secondary pacemaker for the heart. Next it explains what conduction fibers are, where they are located, how they generate action potentials, and their overall purpose. The lecture finishes by explaining why the T wave is an upright (positive) deflection on an ECG.

0:00 The Cardiac Skeleton
2:00 AV Node - Link between Atria and Ventricles
6:24 AV Node - Action Potential Generation and Propagation
20:17 AV Node - Passing Action Potential to Ventricles
23:30 AV Node - What Accounts for the PR Segment
33:30 AV Node - Secondary Pacemaker of the Heart
39:15 Conduction Fibers - Location and Action Potential Generation
59:31 Conduction Fibers - Purpose and Function
1:04:58 Conduction Fibers - Location and Purpose in Atria
1:14:31 Why the T-Wave is an Upward Deflection