Transcription of Intrinsic Conduction System - interactivephysiology.com
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Intrinsic Conduction System - interactivephysiology.com
Intrinsic Conduction SystemGraphics are used with permission of:Pearson Education Inc., publishing as Benjamin Cummings ( )Page 1. Introduction The Intrinsic Conduction System sets the basic rhythm of the beating heart. It consists of autorhythmic cardiac cells that initiate and distribute impulses (action potentials) throughout the 2. Goals To identify the components of the Intrinsic Conduction System . To recognize that the Intrinsic Conduction System coordinates heart activity by determining the direction and speed of heartdepolarization. To relate heart electrical activity to an ECG wave 3. Intrinsic Conduction System This diagram shows the location of the autorhythmic, or nodal cells of the Intrinsic Conduction System :SA NodeInternodal PathwayAV NodeAV BundleBundle BranchesPurkinje Fibers Label this diagram:Page 4. Pathway of DepolarizationSA Node Located in upper right atrium. Initiates the depolarization impulse which, in turn, generates an action potential that spreads throughout the atria to theAV node.
ventricular depolarization takes longer because impulses in the left ventricle must travel from cell to cell. Because ventricular depolarization is taking longer, the QRS complex is wider.
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