Drugs Used In Dysrhythmias

18 Questions | Total Attempts: 149

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Drugs Used In Dysrhythmias

This quiz discusses the drugs used in the treatment of dysrhythmias.


Questions and Answers
  • 1. 
    Which of the following regarding sodium channel blockers is FALSE?
    • A. 

      Fast fibers affected by ischemia tend to have a more negative membrane potential

    • B. 

      They block the channels in the active and inactive states

    • C. 

      They increase the effective refractory period of the cardiac cell

    • D. 

      Qunidine and flecainide are examples

  • 2. 
    Which of the following regarding drugs in class 1A sodium channel blockers is FALSE?
    • A. 

      They generally shorten the QT interval

    • B. 

      Procainamide has a unique toxic effect called lupus erythematosis

    • C. 

      Disopyramide has strong anticholingeric effects

    • D. 

      They have significant interactions with potassium-channel blockers

  • 3. 
    Which of the following regarding lidocaine is FALSE?
    • A. 

      It is a class 1B sodium channel blocker

    • B. 

      It is mainly metabolized by the kidney

    • C. 

      It is indicated for ventricular arrhythmias

    • D. 

      It is notable for CNS reactions

  • 4. 
    Which of the following drug(s) are Class 1A sodium channel blockers? (Check all that apply)
    • A. 

      Diltiazem

    • B. 

      Disopyramide

    • C. 

      Flecainide

    • D. 

      Lidocaine

    • E. 

      Mexiletine

    • F. 

      Phenytoin

    • G. 

      Procainamide

    • H. 

      Propafenone

    • I. 

      Quinidine

    • J. 

      Sotalol

  • 5. 
    Which of the following drug(s) are Class 1B sodium channel blockers? (Check all that apply)
    • A. 

      Diltiazem

    • B. 

      Disopyramide

    • C. 

      Flecainide

    • D. 

      Lidocaine

    • E. 

      Mexiletine

    • F. 

      Phenytoin

    • G. 

      Procainamide

    • H. 

      Propafenone

    • I. 

      Quinidine

    • J. 

      Sotalol

  • 6. 
    Which of the following drug(s) are Class 1C sodium channel blockers? (Check all that apply)
    • A. 

      Diltiazem

    • B. 

      Disopyramide

    • C. 

      Flecainide

    • D. 

      Lidocaine

    • E. 

      Mexiletine

    • F. 

      Phenytoin

    • G. 

      Procainamide

    • H. 

      Propafenone

    • I. 

      Quinidine

    • J. 

      Sotalol

  • 7. 
    Which of the following regarding beta-blockers is FALSE?
    • A. 

      They are used in slowing the ventricular rate

    • B. 

      They are effective in reducing "sudden death" after a myocardial infarction

    • C. 

      They are effective in the therapy of atrial arrhythmias

    • D. 

      They are known to cause tachycardia in high doses

  • 8. 
    Metoprolol, atenolol, and esmolol are cardio-selective beta-blockers.
    • A. 

      True

    • B. 

      False

  • 9. 
    Which of the following regarding amiodarone is FALSE?
    • A. 

      It possesses qualities of all classes of antiarrythmics

    • B. 

      Drug interactions are a major concern

    • C. 

      Adverse effects are a major concern

    • D. 

      It has a relatively short half-life

  • 10. 
    SP is currently taking warfarin 4mg PO QD. She is admitted to the hospital and the team wants to administer amiodarone. What should be her warfarin dose?
    • A. 

      1 mg

    • B. 

      2 mg

    • C. 

      4 mg

    • D. 

      8 mg

  • 11. 
    DP is currently taking digoxin 0.250 mg mg PO QD. She is admitted into the hospital and the team wants to administer amiodarone. What should the digoxin dose be?
    • A. 

      0.125 mg

    • B. 

      0.250 mg

    • C. 

      0.500 mg

    • D. 

      0.750 mg

  • 12. 
    Which of the following statements regarding dronedarone is FALSE?
    • A. 

      It has a shorter half-life than amiodarone

    • B. 

      It has no clinically relevant drug interactions

    • C. 

      It is generally safer than amiodarone

  • 13. 
    Which of the following regarding calcium channel blockers is TRUE?
    • A. 

      They cannot slow conduction through the AV node

    • B. 

      They decrease the AV node refractory period and prolong the PR interval

    • C. 

      They may be combined with beta-blockers for a synergistic effect

  • 14. 
    JY is a patient who is currently being administered sotalol. Which of the following markers is the most important for adjusting the dose of sotalol?
    • A. 

      Blood pressure

    • B. 

      Serum creatinine

    • C. 

      Liver function tests

    • D. 

      Heart rate

  • 15. 
    HC is a 38 year old woman who is admitted to hospital for atrial flutter and must be converted to normal sinus rhythm (NSR). She weighs 60kg and is 5'7'' tall. Her serum creatinine is 1.5 mg/dL. On what dose of dofetilide should she be started?
    • A. 

      Dofetilide is contraindicated in this patient

    • B. 

      125 mcg PO BID

    • C. 

      250 mcg PO BID

    • D. 

      500 mcg PO BID

  • 16. 
    Which of the following regarding adenosine is FALSE?
    • A. 

      It has a half-life of over one month

    • B. 

      It is indicated for the acute termination of supraventricular tachycardia (SVT)

    • C. 

      Its effects can be reversed using theophyline as the antidote

  • 17. 
    Magnesium will act as a calcium channel agonist
    • A. 

      True

    • B. 

      False

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