24 - Purkinje Fibers - small terminal fibers of...

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Sheet1 Page 1 Lecture 19: Cardiovascular System - Cardiac Physiology Reading: chapter 9, section: electrical activity of the heart, pgs 308-315 (pgs 312-320, if using 5th edition) Nodes - specialized cardiac muscle cells capable of pacemaker activity are grouped together to form nodes (Figure 9-8,9-10). Sinoatrial (SA) Node - bundle of specialized cardiac pacemaker cells located in the wall of the right atrium near the opening o f Atrioventricular (AV) Node - bundle of specialized, cardiac pacemaker cells located at the base of the right atrium. This node e x Bundle of His - a tract of specialized, cardiac pacemaker cells that originates at the AV node and divides and projects into the
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Unformatted text preview: Purkinje Fibers - small terminal fibers of specialized, cardiac pacemaker cells that extend from the Bundle of His and spread t h Interatrial Pathway - a pathway of specialized, cardiac cells that conducts pacemaker activity from the right atrium to the left a t Internodal Pathway - a pathway of specialized, cardiac cells that conducts pacemaker activity from the SA node to the AV nod e AV Nodal Delay - pacemaker activity is conducted relatively slowly through the AV node resulting in a delay of approximately 1...
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