Cardiology Quizzes

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medic11student
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42244
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Cardiology Quizzes
Updated:
2010-10-14 21:36:30
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JHPC Medic
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Cardiology
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  1. The generation of pacemaking stimuli is called what?
    Automaticity
  2. The P wave represents what two actions in the heart?
    • 1. Depolarization
    • 2. Contraction
  3. The QRS represents what two actions of the heart?
    • 1. Ventricular Depolarization
    • 2. Contraction
  4. The T wave represents what action in the heart?
    Repolarization
  5. What two valves lie between the atria?
    • 1. Mitral valve
    • 2. Tricuspid valve
  6. What level of heart muscle does the terminal end of the Purkinje Fibers lay?
    Endocardium
  7. Ventricular conduction is composed of Purkinje Fibers that use fast moving _____ ions for conduction.
    Sodium ions
  8. What are the two phases of ventricular repolarization and what part of the EKG complex represents each phase?
    • 1. ST segment - plateau phase
    • 2. T wave - rapid phase
  9. Ventricular Systole begins at the ___ and persists until the end of the ___ wave.
    Ventricular Systole begins at the Q wave and persists until the end of the T wave.
  10. One little box on the EKG paper represents how many milliseconds?
    0.04 milliseconds
  11. One large box represents how many milliseconds on the EKG paper?
    0.20 milliseconds
  12. Patients with long QT syndrome are in danger of developing what?
    Rapid Ventricular Rhythms
  13. The release of free Calcium Ions into the interior of the myocytes produce mycardial ______.
    The release of free Calcium Ions into the interior of the myocytes produce mycardial contraction.
  14. Following depolarization, repolarization is due to the controlled outflow of ____ ions from the myocytes.
    Following depolarization, repolarization is due to the controlled outflow of Potassium ions from the myocytes
  15. The smallest divisions of the EKG paper is how many MM squares?
    1 MM
  16. Upward deflection on the EKG is described as _____.
    Upward deflection on the EKG is described as positive amplitude/magnitude.
  17. Leads I, II, and III are called what type of leads?
    Bipolar Leads
  18. Dr. Wiliam Einthoven is known for what?
    EKG placement leads, bipolar lead configuration
  19. aVR, aVL, and aVF are known as ______ leads.
    aVR, aVL, and aVF are known as unipolar/augmented leads.
  20. What neurotransmitter activates the heart's B1 adrenergic receptors?
    Norepinephrine is the neurotransmitter that activates the heart's B1 adrenergic receptors.
  21. Sinus bradycardia has a rate of <_____.
    Sinus bradycardia has a rate of <60bpm.
  22. Junctional foci have an inherent rate of ___ to ___.
    Junctional foci have an inherent rate of 40 to 60 bpm.
  23. Ventricular foci have an inherent rate of ___ to ___.
    Ventricular foci have an inherent rate of 20 to 40 bpm.
  24. Describe Merciful Syncope.
    Merciful Syncope - Severe pain induces parasympathetic nervous system reflex and slows the SA node and lowers blood pressure
  25. Describe Neuro-Cardiogenic Syncope.
    Neuro-Cardiogenic Syncope - prolonged standing stimulates sinus pacing but vasoconstriction fails
  26. What is the normal PR interval?
    The normal PR interval is <0.20 ms.
  27. What is the normal QRS interval?
    The normal QRS interval is < 0.12 ms.
  28. If an impulse is moving towards a lead it will have a _________ deflection.
    If an impulse is moving towards a lead it will have an upward/positive deflection.
  29. Phase II of the cardiac action potential is also known as?
    Phase II of the cardiac action potential is also known as the plateau.
  30. Phase I of the cardiac action potential is known as?
    Phase I of the cardiac action potential is known as initial repolarization.
  31. The left anterior descending artery supplies which wall of the heart?
    The left anterior descending artery supplies the anterior wall of the heart.
  32. The left circumflex artery suppplies which two walls of the heart?

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