HPER-P - Health, Physical Education And Recreation HPER-P 374 Lecture Notes - Lecture 1: Anterior Interventricular Branch Of Left Coronary Artery, Coronary Circulation, Purkinje Fibers

• School: IUPUI
• Department: HPER-P - Health, Physical Education And Recreation
• Course: HPER-P - Health, Physical Education And Recreation HPER-P 374
• Professor: Dr.Mc Kenzie

Document Summary

The main job of the heart is to circulate blood containing oxygen and nutrients to all of the living cells of the body. The organized depolarization, and consequent contraction, of the heart is facilitated by specialized nerve fibers in the heart wall. These nerve fibers include: the sa node, the internodal and interatrial tracts, the av node, the. Bundle of his, the right and left bundle branches and the purkinje fibers. Nerve impulses travel more rapidly through these nerve fibers than through myocardial cells. The electrocardiogram is a recording device that produces a graphic representation (or tracing) of the electrical activity as it moves through heart. The three ecg events listed above represent one cardiac cycle or one contraction of the heart. The location of an ekg electrode on the a person"s skin is a positively charged reference point on the skin.