Session I: Basic Science and Fundamentals of Electrophysiology-6153-Sinoatrial and Atrioventricular Nodes and His-Purkinje System: Anatomy, Evaluation, Autonomics and Therapy

Video Transcription

Video Summary

The video features two segments, the first by John Miller and the second by Dr. Stephenson, discussing different aspects of the conduction system of the heart. <br /><br />John Miller focuses on sinoatrial and AV nodal conduction. He discusses the anatomy, evaluation, and therapy related to these conduction pathways, emphasizing the importance of understanding cardiac anatomy for electrophysiologists. He explains genetic abnormalities that can affect cardiac impulse and conduction physiology. Miller delves into the evaluation of abnormal cardiac impulse formation and conduction using ECG and intracardiac recordings. He highlights the conditions and factors that can affect sinus node and AV nodal conduction, as well as various disorders associated with these conduction pathways.<br /><br />Dr. Stephenson's segment concentrates on the AV node, His bundle, and bundle branches. He explains how to record the His potential and discusses the anatomy and function of the His-Purkinje system. He talks about the different fascicles of the left bundle branch and possible injuries to these branches. Stephenson explains conduction block in the His-Purkinje system, the difference between transient and permanent block, and the phenomenon of phase three and phase four block. He provides examples of conduction abnormalities, including AV block and bundle branch block. Stephenson emphasizes the importance of stress testing the conduction system and the potential use of drugs to assess conduction. He also discusses the hazards associated with conduction block and the importance of careful evaluation and pacing system placement in patients with conduction abnormalities.<br /><br />Summarizing both segments, the video provides a comprehensive overview of the anatomy, evaluation, and therapy of the sinotrial and AV nodal conduction pathways, as well as the His-Purkinje system. The speakers discuss genetic abnormalities, various factors affecting conduction, and different types of conduction abnormalities. They emphasize the importance of understanding cardiac anatomy, careful evaluation, and appropriate therapy in patients with conduction system abnormalities.

Keywords

video

segments

John Miller

Dr. Stephenson

conduction system

cardiac anatomy

genetic abnormalities

conduction physiology

His-Purkinje system

conduction abnormalities

evaluation