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6 Cards in this Set
- Front
- Back
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What is the conduction system of the heart?
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Heart's electrical system that stimulates the heart to contract.
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Give the 4 main parts of the heart conduction system.
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Sinoatrial Node (SA)
Atrioventricular Node (AV) Bundle of His Purkinje Fibers |
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Sinoatrial Node Function
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"Pacemaker"
superior aspect of R Atrium 60-100 impulses per minute responsible for atria contraction w/atrioventricular node |
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Atrioventricular Node Function
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inferior aspect of R Atrium
40-60 impulses per minute responsible for atria contraction w/sinoatrial node |
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Bundle of His Function
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Gives last back up with 20-40 impulses
Located in the septum of heart which divides right and left Support and conduct contraction of ventricles |
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Purkinje Fibers Function
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Allow ventricle muscles to contract in unison for a strong contraction
Located in myocardium (ventral walls) |
