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

Correct Answer is B

Explanation

A. Sick sinus syndrome – This involves an abnormal SA node function, often with varying rhythm disturbances (e.g., sinus pauses, bradycardia-tachycardia). The strip described is regular and does not reflect these changes.
B. Normal sinus rhythm – The rhythm is regular, the PR interval is within normal limits (0.12–0.20 seconds), the heart rate is 60 beats/min (within the normal range of 60–100), and P waves precede each QRS complex consistently.
C. Sinus bradycardia – Although the rate is 60, which is at the low end of normal, it is not below 60. Bradycardia is defined as <60 bpm.
D. First-degree heart block – First-degree AV block is characterized by a prolonged PR interval >0.20 seconds. The PR interval here is 0.16 seconds, which is normal.

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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 B

Explanation

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