This document provides an overview of normal sinus rhythm and common cardiac rhythm disturbances. It defines normal sinus rhythm and its parameters. It then discusses how arrhythmias can arise from problems in the sinus node, atrial cells, AV junction, or ventricular cells. Specific arrhythmias are identified that can result from abnormalities in each of these areas, including premature contractions, flutters, fibrillations, tachycardias, and blocks. The document concludes by directing the reader to a practice quiz on the topic.
11. Atrial Cell Problems Atrial cells can also: • fire continuously from multiple foci or fire continuously due to multiple micro re-entrant “wavelets” Atrial Fibrillation Atrial Fibrillation
12. Teaching Moment Multiple micro re-entrant “wavelets” refers to wandering small areas of activation which generate fine chaotic impulses. Colliding wavelets can, in turn, generate new foci of activation. Atrial tissue
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15. End of Module III Normal Sinus Rhythm Proceed to Module III Practice Quiz on WebCT
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