Paramedic Cardiac Intro

  1. You are treating a patient who has a damaged SA node that is no longer pacing the heart. You would expect the patient's heart to
    Slow down
  2. Acetylcholine affects the heart by:
    Decreasing heart rate
  3. The ventricles of the heart are innervated mainly by:
    Sympathetic nerve fibers
  4. While evaluating a 22-year-old female runner who called 9-1-1 because she fell and twisted her ankle. You apply an ECG monitor. Her heart rate is 46, P waves are normal and upright, the PR interval is 0.16 second, and the QRS complex looks normal. Skin is warm and dry. She of moaning in pain. There is a QRS complex following each P wave. The treatment plan at this time for this patient's heart rate should include:
    No treatment at tis time.
  5. The resting membrane potential is determined primarily by the difference between the intracellular potassium ion level and the:
    Extracellular potassium ion level
  6. Parasympathetic control of the heart is provided by the:
    Vagus nerve
  7. Depolarization takes place when:
    Sodium ions rush into the cell
  8. Deep and symmetrically inverted T waves may be indicative of:
    Cardiac Ischemia
  9. When analyzing an ECG tracing, you notice that the rhythm is highly irregular. The best method to calculate the rate is the:
    Six-second count method
  10. The activation of myocardial tissue more than one time by the same impulse is called:
  11. The AV junction is formed by the AV node and the:
    Bundle of HIS
  12. Stroke volume depends on preload, after load and
    Myocardial contractility
  13. To increase cardiac output, you can:
    Increase both heart rate and stroke volume
  14. The valve between the right atrium and the right ventricle is the:
    Tricuspid valve
  15. Which of the following is an unipolar lead?
  16. During the action potentials:
    There is excessive sodium in the cell
  17. Relaxation of the heart is referred to as:
  18. An ECG can help to determine:
    Whether there is ischemic cardiac muscle
  19. The sodium-potassium pump functions to move:
    Potassium ions into the cell and sodium ions out of the cell
  20. The chief pacemaker of the heart under normal conditions is the:
    SA node
  21. The most important factor in determining stroke volume is:
  22. Which of the following may cause sinus bradycardia?
    Intrinsic sinus node disease
  23. Each small square on the ECG graph paper represents________ mV
  24. The triplicate method of determining heart rate is :
    Accurate when the heart rate is normal and greater than 50 beats per minute
  25. Phase I of the action potential represents the period of:
    Early rapid repolarization
  26. Lead I looks at the heart from what view?
  27. The brief pause between the P wave and QRS complex represents:
    A momentary conduction delay at the AV junction
  28. The P-R interval should be no shorter than _____ seconds and no longer than ____ seconds in duration
    0.12, 0.20
  29. An increase in peripheral vascular resistance:
    Decreases stroke volume
  30. Jugular vein distention in cardiac patients should be evaluated with the patient positioned:
    With the head elevated 45 degrees
  31. An ECG can help to determine:
    Whether there is iscemic cardiac muscle
  32. An ECG strip shows a regular rhythm with a QRS complex of 0.8, a rate of 145, a PR interval of 0.12, and one upright P wave before every QRS complex. You suspect that this rhythm is:
    Sinus tachycardia
  33. In lead III placement, the positive lead is located on the:
    Left leg
  34. The best lead for monitoring dysrhythmias is:
    Lead II
  35. The duration of the QRS complex should be ________ seconds
    0.08 to 0.20
  36. You are treating a 75-year-old woman who has a history of diabetes and atherosclerosis. Her chief complaint is persistent heartburn. You suspect:
    This may be a cardiovascular problem because women and patients with diabetes often present with atypical symptoms
  37. Hypocalcemia and hypomagnesemia would MOST likely result in:
    increased myocardial irritability
  38. Which of the following is a bipolar lead?
    Lead II
  39. Leads II and III are:
    Inferior leads
  40. In the event of a coronary artery blockage, the muscle of the heart can receive blood from the:
    Anastomoses that provide collateral circulation
  41. Standard ECG paper is divided into 1-mm blocks and moves past the stylus of the ECG at 25 mm per second. Each small block represents:
    0.04 seconds
  42. In order to ensure proper electrolyte distribution and maintain the polarity of the cell membrane, the sodium-potassium pump
    moves two potassium ions into the cell for every three sodium ions it moves out of the cell.
  43. While assessing a patient you identify a carotid bruit. This leads you to believe that the patient:
    Has atherosclerosis
  44. The PR interval represents the time it takes an electrical impulse to
    be conducted through the atria and the AV node.
  45. If the heart's secondary pacemaker becomes ischemic and fails to initiate an electrical impulse
    you should expect to see a heart rate slower than 40 beats/min.
  46. The circumflex artery is a branch of the:
    Left coronary artery
  47. Which of the following cardiac pacemakers has an intrinsic rate of 40 to 60 beats per minute?
    AV junction
  48. The right atrium receives blood from the systemic circulation and the:
    Coronary veins
  49. The first upward deflection on an ECG tracing is the:
    P wave
  50. While evaluating a 22-year-old female runner who called 911 because she fell and twisted her ankle, you apply an ECG monitor. Her heart rate is 46, P waves are normal and upright, the PR interval is 0.16 second, and the QRS complex looks normal. There is a QRS complex following each P wave. The patient's ECG tracing reflects:
    Sinus Bradycardia
  51. The part of the ECG tracing that is most important for detecting life-threatening arrhythmias is the:
    QRS complex
  52. The ST segment reflects the:
    Early repolarization of the ventricles
  53. While analyzing an ECG you cannot identify a Q wave. This means:
    The Q wave may not be visible in the lead you are viewing
  54. In lead II placement, the positive lead is located on the:
    Left leg
  55. The sinoatrial node:
    will outpace any slower conduction tissue
  56. The Starling law states that:
    Myocardial fibers contract more forcefully when they are stretched
  57. From PAR 2000, atropine works by inhibiting:
    Parasympathetic response
Card Set
Paramedic Cardiac Intro
Paramedic Cardiac Intro quiz