cardiovascular system ekg.txt

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  1. ´╗┐This is a recording of the electrical changes that occur in the myocardium during a cardiac cycle
    An electrocardiogram
  2. This wave is produced when atrial fibers depolarize
  3. this wave is produced when ventricular fibers depolarize.
  4. This wave is produced when the ventricular fibers repolarize
  5. This wave is shows the delay in the AV node
    PR interval
  6. What is the EFFCT of the P wave
    Atrial contraction
  7. What is the EFFECT of the QRS complex
    Ventricular contraction
  8. What is the EFFECT of the T wave
    Ventricular relaxation
  9. What are the two functions of the AV node
  10. delay
  11. This is responsible for coordinating events of the cardiac cycle
    The cardiac conduction system
  12. this structure is located in the wall of the right atrium and initiates one impulse after another and is called the pacemaker because it generates the heart's rhythmic contractions
    The S-A node
  13. How does the cardiac impulse travel from the S-A node into the atrial syncytium
    it goes from cell to cell via gap junctions.
  14. Conducting fibers deliver impulses from the S-A node to the ?
    AV node
  15. This structure is located in the inferior part of the interatrial septum and provides the only normal conduction pathway between the atrial and ventricular syncytiums
    The A-V node
  16. Why are the impulses are delayed as they move through the A-V node
    this allows time for atria to finish contracting
  17. From the A-V node, impulses pass to the ?
    Bundle of HIS
  18. The A-V bundle (Bundle of HIS) is located in the superior part of the interventricular septum and gives rise to? .
    left and right bundle branches
  19. This structure carres impulses to distant regions of the ventricular myocardium?
    --Purkinje fibers
  20. This structure is located in the inferior portion of the interventricular septum, papillary muscles, and in the ventricular walls?
    --Purkinje fibers
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cardiovascular system ekg.txt
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