A nurse is preparing to administer warfarin to a client who has atrial fibrillation. The nurse should explain that the purpose of this medication is which of the following?

To convert atrial fibrillation to sinus rhythm

To slow the response of the ventricles to the fast atrial impulses

To dissolve clots in the bloodstream

To reduce the risk of stroke in clients who have atrial fibrillation

Answer and Explanation

The Correct Answer is D

A. Warfarin does not convert atrial fibrillation to sinus rhythm; it is an anticoagulant, not a rhythm control medication.
B. Slowing ventricular response is achieved with rate-control medications like beta blockers or calcium channel blockers, not warfarin.
C. Warfarin prevents clot formation but does not dissolve existing clots.
D. Warfarin reduces the risk of stroke by preventing thrombus formation in clients with atrial fibrillation

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Correct Answer is B

Explanation

A. A heart rate of 160/min is more indicative of the progressive stage of shock, where compensation begins to fail.
B. Blood pressure 115/68 mmHg is within normal limits and reflects the compensatory stage, where the body maintains perfusion through mechanisms like increased heart rate and vasoconstriction.
C. Hypokalemia is not a typical finding in the compensatory stage; electrolyte shifts are more pronounced in later stages.
D. Mottled skin is a sign of poor perfusion, typically seen in the progressive or irreversible stages of shock.

A. Sinus bradycardia B. First degree heart block C. Normal sinus rhythm D. Sick sinus syndrome

Correct Answer is C

Explanation

A. Sinus bradycardia is characterized by a heart rate less than 60 beats/min, but in this case the rate is exactly 60, which is normal lower limit.
B. First degree heart block involves a prolonged PR interval (>0.20 seconds); here, the PR interval is normal (0.16 seconds).
C. Normal sinus rhythm has regular P waves and QRS complexes, a normal PR interval (0.12–0.20 seconds), and a heart rate between 60–100 beats/min.
D. Sick sinus syndrome is characterized by irregular rhythms and abnormal sinus node function, which is not indicated here.

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A nurse is preparing to administer warfarin to a client who has atrial fibrillation. The nurse should explain that the purpose of this medication is which of the following?

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Naxlex Comprehensive Predictor Exams

A nurse is caring for a client who is in the compensatory stage of shock. Which of the following findings should the nurse expect?

Correct Answer is B

Explanation

A nurse is assessing an ECG rhythm strip. The P waves and QRS complexes are regular. The PR interval is 0.16 second. The overall heart rate is 60 beats/min. The nurse assesses the cardiac rhythm as:

Correct Answer is C

Explanation

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