Cardiac Conduction System

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Last updated 7:17 AM on 8/25/26
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5 Terms

1
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What structures make up the cardiac conduction system?

  • SA node

  • Internodal tracts

  • AV node

  • Bundle of His

  • Right & left bundle branches

  • Purkinje fibers


2
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What is the normal pacemaker of the heart?

Sinoatrial (SA) node

3
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What is the basic cardiac conduction sequence?

  • SA node

  • → Internodal pathways

  • → AV node

  • → Bundle of His

  • → Right/left bundle branches

  • → Purkinje fibers


4
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What is the function of the Bachmann bundle?

  • Conducts cardiac impulse

  • Preferentially from:

    • Right atrium → left atrium


5
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What do Purkinje fibers do?

  • Extend throughout ventricular walls

  • Rapidly distribute electrical impulse

  • Coordinate ventricular contraction