Ch26-Key_Terms

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Author:
tford7
ID:
102846
Filename:
Ch26-Key_Terms
Updated:
2011-09-19 18:56:38
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Ch26 Key Terms
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Ch26-Key_Terms
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  1. A standardized recording of the electrical activity of the heart and may be used to detect heart irregularities, lack of oxygen to parts of the heart, and enlargement of the chambers.
    12-lead electrocardiogram (ECG)
  2. Deviations from normal cardiac rhythm
    arrhythmias
  3. When a group of cardiac cells have the ability to generate an electrical impulse spontaneously.
    automaticity
  4. The imaginary line drawn between two electrodes
    axis
  5. The ability of the cardiac cells to transmit an impulse.
    conductivity
  6. The capability of muscle fibers to shrink.
    contractility
  7. Delivering an electrical shock to the heart so that it completely depolarizes the cardiac cells in an effort to terminate ventricular fibrillation.
    defibrillation
  8. Electrical changing in the interior of an excitable cell from negative to positive, which results in an action potential.
    depolarization
  9. A disturbance in rhythm
    dysrhythmia
  10. Graphic representation of atrial depolarization
    P wave
  11. An estimate of the amount of time it takes the impulse to travel from the SA node through the AV node, the bundle of His, and the main part of the left bundle branch.
    PR interval
  12. Conductive fibers that help to spread the electrical impulses of throughout the ventricular muscle. They have an inherent rate of 15 to 40 beats per minute.
    Purkinje fibers
  13. Graphic representation of ventricular depolarization.
    QRS complex
  14. Graphic representation of the amount of time it takes for ventricular depolarization and repolarization.
    QT interval
  15. Electrical change in the interior of an excitable cell following depolarization in which the inside of the cell becomes more negatively charged
    repolarization
  16. Primary pacemaker of the heart with an inherent rate of 60 to 100 beats per minute
    SA node
  17. Delivering an electrical shock to the heart that is synchronized to the patient’s R wave.
    synchronized cardioversion
  18. Graphic representation of ventricular repolarization.
    T wave

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