Conduction system of heart
[DOC File]THE HEART - Pennsylvania State University
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The conduction system initiates and superimposes a rhythm with a rapid rate that it transmits to all parts of the heart and which can be regulated by the nervous system. The ventricles and atria also have innate powers of spontaneous contraction, independent of any nervous influence.
[DOC File]SSGP&S3 Ch 11-WKS
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Cells in each area of the myocardial conduction system have their own rate; the inherent rhythm of the AV node determines a healthy individual’s resting heart rate. The inherent rhythm of the SA node determines a healthy individual’s. resting heart rate. + O 2. The events diagrammed in the electrocardiogram (ECG) precede contraction of the ...
[DOC File]Cardiac Action Potential ADAM
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• The intrinsic conduction system of the heart initiates depolarization impulses. • Action potentials spread throughout the heart, causing coordinated heart contraction. • An ECG wave tracing records the electrical activity of the heart. ** Now is …
[DOC File]The Cardiovascular System: The Heart
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Heart Physiology: Intrinsic Conduction System • Initiate action potentials • Have unstable resting potentials called pacemaker potentials • Use calcium influx (rather than sodium) for rising phase of the action potential. Na + ions initiate myocyte depolarization & are responsible for conduction through the myocardium ...
[DOC File]Chapter 18 - Cardiovascular System: The Heart
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B. conduction system of heart – intrinsic. 1. components-nodes-specialized nervelike, noncontractile cardiac cells-initiate and distribute impulses throughout heart-therefore heart depolarizes and contracts in orderly/sequential manner. from atria to ventricles-how heart …
[DOC File]Intrinsic Conduction System
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• The intrinsic conduction system of the heart initiates depolarization impulses. • Action potentials spread throughout the heart, causing coordinated heart contraction. • An ECG wave tracing records the electrical activity of the heart. ** Now is a good time to go to quiz questions 3 and 4:
The Conducting System
The Conducting System. Introduction The heart's conducting system consists of the . sinoatrial node (SA node), atrioventicular node (AV node), the bundle of His, the bundle branches and the Purkinje fibers. The electrical impulse that causes rhythmic contraction of heart muscles arises in the . SA node. which is the intrinsic pacemaker of the ...
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