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7 Cards in this Set
- Front
- Back
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SA Node
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Function: pacemaker for the heart, initiates impulses
Rate: 60-100 bpm |
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Internodal Pathways
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Function: conducts the impulse from SA node to AV node
Rate: n/a |
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AV Node
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Function: slows conduction
Rate: 40-60 bpm |
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Bundle of His
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Function: conducts impulse from AV node to bundle branches
Rate: 20-40 bpm |
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Bundle Branches (Right & Left)
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Function: conducts impulses to R and L ventricles
Rate: 20-40 bpm |
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Purkinje Fibers
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Function: conducts impulses to ventricular muscle cells
Rate: 20-40 bpm |
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Events of the Cardiac Cycle
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1. SA node depolarizes
2. Atria depolarize 3. Atria contract 4. AV node delays conduction 5. Ventricles depolarize 6. Ventricles contract 7. Ventricles repolarize 8. Ventricles relax |
