Quiz 1.6

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Ritameeker
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216162
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Quiz 1.6
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2013-04-28 11:29:50
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Cardiology
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Quiz 1.6 - Cardiology
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  1. The proportion of the left ventricular volume that is pumped out of the heart during systole is the:

    A. ejection fraction
    B. preload
    C. afterload
    D. stroke volume
    A. ejection fraction
    (this multiple choice question has been scrambled)
  2. For a resting potential in a cardiac cell to exist, there must be an:

    A. adequate number of potassium ions inside the cell and sodium ions outside the cell
    B. adequate number of sodium ions inside the cell and potassium ions outside the cell
    C. influx of calcium ions into the cell
    D. ionic equilibrium between in the inside and outside of the cell
    A. adequate number of potassium ions inside the cell and sodium ions outside the cell
    (this multiple choice question has been scrambled)
  3. The valve between the right atrium and right ventricle is the _____ valve.

    A. aortic
    B. tricuspid
    C. bicuspid
    D. pulmonic
    B. tricuspid
    (this multiple choice question has been scrambled)
  4. Which of the following is most characteristic of right heart failure?

    A. JVD, peripheral edema, and pulmonary edema
    B. Rales, cough productive of blood-tinged sputum
    C. Ascites, peripheral edema, and cyanosis
    D. JVD, peripheral edema, and hepatic engorgement
    D. JVD, peripheral edema, and hepatic engorgement
    (this multiple choice question has been scrambled)
  5. The intrinsic firing rate of the AV node is _____ to _____ times per minute.

    A. 60 to 80
    B. 40 to 60
    C. 20 to 40
    D. 80 to 100
    B. 40 to 60
    (this multiple choice question has been scrambled)
  6. Which of the following items is most likely to interfere with the function of an implanted cardiac pacemaker?

    A. cellular telephone
    B. hair dryer
    C. magnet
    D. television remote control
    C. magnet
    (this multiple choice question has been scrambled)
  7. The amount of resistance that must be overcome by the left ventricle during systole is called:

    A. cardiac output
    B. stroke volume
    C. preload
    D. afterload
    D. afterload
    (this multiple choice question has been scrambled)
  8. The first phase of the cardiac cycle is:

    A. ejection
    B. contraction
    C. systole
    D. diastole
    D. diastole
    (this multiple choice question has been scrambled)
  9. Release of acetylcholine at the neuroeffector junction would result in a(n):

    A. positive dromotropic effect
    B. increase of both sympathetic and parasympathetic tone
    C. positive inotropic effect
    D. negative chronotropic effect
    D. negative chronotropic effect
    (this multiple choice question has been scrambled)
  10. Parasympathetic innervation of the heart occurs via the:

    A. cardioaccelerator nerves
    B. spinal accessory nerve
    C. vagus nerve
    D. phrenic nerve
    C. vagus nerve
    (this multiple choice question has been scrambled)
  11. You have administered a medication to a patient, resulting in a decreased speed of cardiac impulse conduction.  This drug is most accurately described as having a _____ effect.

    A. positive chronotropic
    B. negative chronotropic
    C. negative dromotropic
    D. positive dromotropic
    C. negative dromotropic
    (this multiple choice question has been scrambled)
  12. When the ECG paper is traveling at the standard rate of 25 mm/sec, a large box in the horizontal direction equals:

    A. 0.12 seconds
    B. 0.08 seconds
    C. 0.20 seconds
    D. 0.24 seconds
    C. 0.20 seconds
    (this multiple choice question has been scrambled)
  13. On a properly calibrated ECG machine, 1 mV is equivalent to a height of _____ boxes.

    A. five small
    B. one large
    C. ten small
    D. four large
    C. ten small
    (this multiple choice question has been scrambled)
  14. Which of the following is the correct sequence of cardiac electrical activity?

    1 AV node
    2 internodal pathways
    3 bundle of His
    4 SA node
    5 Purkinje fibers
    6 bundle branches

    A. 4, 2, 1, 3, 6, 5
    B. 1, 2, 4, 3, 5, 6
    C. 1, 2, 4, 3, 6, 5
    D. 4, 1, 2, 3, 6, 5
    A. 4, 2, 1, 3, 6, 5
    (this multiple choice question has been scrambled)
  15. The SA and AV nodes are often supplied by both the _____ and _____ arteries.

    A. circumflex, anterior descending
    B. right coronary, circumflex coronary
    C. left coronary, posterior descending
    D. marginal, anterior descending
    B. right coronary, circumflex coronary
    (this multiple choice question has been scrambled)
  16. A patient's ECG shows regular RR intervals of 0.48 seconds, a PR interval of 0.12 seconds, and a QRS of 0.08 seconds.  This best fits the criteria for:

    A. sinus tachycardia
    B. normal sinus rhythm
    C. sinus bradycardia
    D. supraventricular tachycardia
    A. sinus tachycardia
    (this multiple choice question has been scrambled)
  17. Beta-blockers generally have which of the following effects?

    A. vasoconstriction
    B. increased myocardial contractility
    C. increased cardiac conduction
    D. decreased myocardial contractility
    D. decreased myocardial contractility
    (this multiple choice question has been scrambled)
  18. Which of the following occurs during depolarization of a cardiac cell?

    A. potassium moves into the cell
    B. the cell becomes negatively charged
    C. the cell becomes relatively more positively charged
    D. sodium moves out of the cell
    C. the cell becomes relatively more positively charged
    (this multiple choice question has been scrambled)
  19. The total duration of ventricular depolarization is represented by the _____ on the ECG.

    A. QT interval
    B. R-R interval
    C. QRS duration
    D. PQ interval
    A. QT interval
    (this multiple choice question has been scrambled)
  20. Stroke volume x heart rate x peripheral vascular resistance =

    A. cardiac output
    B. blood pressure
    C. end-diastolic pressure
    D. ejection fraction
    B. blood pressure
    (this multiple choice question has been scrambled)
  21. Blood entering the left atrium arrives via the:

    A. pulmonary vein
    B. superior and inferior vena cava
    C. pulmonary artery
    D. bicuspid valve
    A. pulmonary vein
    (this multiple choice question has been scrambled)
  22. Typical stroke volume is about _____ of the volume of the left ventricle.

    A. one-third
    B. three-quarters
    C. two-thirds
    D. one-half
    C. two-thirds
    (this multiple choice question has been scrambled)
  23. Your patient is found sitting on the edge of the bathtub with cool, diaphoretic skin.  She states she became lightheaded and nearly "passed out" while vomiting.  Your cardiac monitor shows a sinus bradycardia at a rate of 48.  Which of the following is most likely?

    A. increased parasympathetic tone
    B. disease of the cardiac conduction system
    C. sick sinus syndrome
    D. use of sympathomimetic medications
    A. increased parasympathetic tone
    (this multiple choice question has been scrambled)
  24. There are 15 small boxes between R waves on an ECG tracing.  What is the heart rate?

    A. 100
    B. 120
    C. 150
    D. 20
    A. 100
    (this multiple choice question has been scrambled)
  25. The QRS complex represents:

    A. atrial repolarization
    B. ventricular repolarization
    C. ventricular depolarization
    D. atrial depolarization
    C. ventricular depolarization
    (this multiple choice question has been scrambled)

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