Test II

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Author:
iseel
ID:
67245
Filename:
Test II
Updated:
2011-02-18 03:36:59
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Chp27
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  1. ablation
    purposeful destruction of heart muscle cells, usually inan attempt to control a dysrhythmia
  2. antiarrhythmic
    a medication that suppresses or prevents a dysrhythmia
  3. automaticity
    ability of the cardiac cells to initiate an electricalimpulse
  4. cardioversion
    electrical current administered in synchrony withthe patient’s own QRS complex to stop a dysrhythmia
  5. chronotropy
    rate of impulse formation
  6. conduction
    transmission of electrical impulses from one cell toanother
  7. defibrillation
    electrical current administered to stop a dys-rhythmia, not synchronized with the patient’s QRS complex
  8. depolarization
    process by which cardiac muscle cells changefrom a more negatively charged to a more positively chargedintracellular state
  9. dromotropy
    conduction velocity
  10. dysrhythmia (also referred to as arrhythmia)
    disorder of theformation or conduction (or both) of the electrical impulsewithin the heart, altering the heart rate, heart rhythm, or bothand potentially causing altered blood flow
  11. implantable cardioverter defibrillator (ICD)
    a device implantedinto the chest to treat dysrhythmias
  12. inhibited
    in reference to pacemakers, term used to describe thepacemaker withholding an impulse (not firing)
  13. inotropy
    force of myocardial contraction
  14. P wave
    the part of an electrocardiogram (ECG) that reflectsconduction of an electrical impulse through the atrium; atrialdepolarization
  15. paroxysmal
    a dysrhythmia that has a sudden onset and/or termination and is usually of short duration
  16. PP interval
    the duration between the beginning of one P waveand the beginning of the next P wave; used to calculate atrialrate and rhythm
  17. PR interval
    the part of an ECG that reflects conduction of anelectrical impulse from the sinoatrial (SA) node through theatrioventricular (AV) node
  18. proarrhythmic
    an agent (eg, a medication) that causes or exacerbates a dysrhythmia
  19. QRS complex
    the part of an ECG that reflects conduction of an elec-trical impulse through the ventricles; ventricular depolarization
  20. QT interval
    the part of an ECG that reflects the time from ven-tricular depolarization through repolarization
  21. repolarization
    process by which cardiac muscle cells return to a more negatively charged intracellular condition, their resting state
  22. sinus rhythm
    electrical activity of the heart initiated by thesinoatrial (SA) node
  23. ST segment
    the part of an ECG that reflects the end of the QRScomplex to the beginning of the Twave
  24. supraventricular tachycardia (SVT)
    a rhythm that originates inthe conduction system above the ventricles
  25. TP interval
    the part of an ECG that reflects the time between theend of the T wave and the beginning of the next P wave; usedto identify the isoelectric line
  26. T wave
    the part of an ECG that reflects repolarization of theventricles
  27. triggered
    in reference to pacemakers, term used to describe therelease of an impulse in response to some stimulus
  28. U wave
    the part of an ECG that may reflect Purkinje fiber repolarization; usually it is not seen unless a patient’s serumpotassium level is low
  29. ventricular tachycardia (VT)
    a rhythm that originates in the ventricles

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