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 D

Explanation

A. Ventricular tachycardia is a run of three or more consecutive ventricular beats at a rapid rate, not every other beat.
B. Multifocal premature ventricular contractions (PVCs) arise from different ventricular foci and have different shapes, but this scenario describes uniform shape and consistent pattern.
C. Ventricular couplets are two consecutive PVCs, not a pattern where every other beat is abnormal.
D. Ventricular bigeminy is the correct term for a rhythm in which every other beat is a premature ventricular contraction (PVC). These PVCs typically have no visible P wave and a wide, bizarre QRS complex, matching the description given.

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

The nurse notes that a client's cardiac monitor shows that every other beat is earlier than expected, has no visible P wave, and has a QRS complex that is wide and bizarre in shape. How will the nurse document the rhythm?

Correct Answer is D

Explanation

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Correct Answer is C

Explanation

The nurse notes that leads I, II, and III differ from one another on the cardiac rhythm strip because:

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