The nurse is caring for a client with a permanent pacemaker. The client's monitor shows a pacemaker spike prior to the p wave. What would be the nurse's best action?

Increase the pacemaker sensitivity

Document that the pacemaker is regular

Set the pacemaker to the asynchronous mode

Document that the atria are being paced

Answer and Explanation

The Correct Answer is D

A. Increase the pacemaker sensitivity: Adjusting pacemaker sensitivity is a technical function typically managed by a cardiologist or device technician. There is no indication from the information provided that the pacemaker is under- or over-sensing, so no adjustment is warranted.

B. Document that the pacemaker is regular: While the pacemaker may be functioning regularly, this statement is vague and does not accurately describe the observed pacing activity. The key observation is the spike occurring before the P wave, which requires more specific documentation.

C. Set the pacemaker to the asynchronous mode: Asynchronous pacing means the pacemaker fires at a set rate regardless of the patient's intrinsic rhythm and is generally reserved for specific situations such as during surgery or when interference with sensing is suspected. There is no evidence of pacemaker malfunction or need to override sensing in this scenario.

D. Document that the atria are being paced: A pacemaker spike immediately before the P wave indicates atrial pacing. This means the pacemaker is stimulating the atria, leading to atrial depolarization. This is the appropriate interpretation and should be documented clearly.

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Correct Answer is C

Explanation

A. Radiofrequency ablation: This is used to treat tachyarrhythmias such as atrial fibrillation, atrial flutter, or supraventricular tachycardia (SVT). The ECG shown does not demonstrate any tachycardic rhythm rather, it shows a bradyarrhythmia with dropped QRS complexes, which suggests a conduction block, not a reentrant circuit.

B. Administration of amiodarone: Amiodarone is primarily used for ventricular arrhythmias or atrial fibrillation. It is not effective in treating bradyarrhythmias or heart blocks such as those seen in this rhythm strip.

C. Insertion of a pacemaker: The rhythm strip shows intermittent dropped QRS complexes with consistent P waves—this is indicative of second-degree AV block, Mobitz II. This type of conduction block can progress to complete heart block and is often treated with the insertion of a permanent pacemaker to maintain cardiac output.

D. Administration of adenosine: Adenosine is used to terminate SVT by temporarily blocking AV node conduction. It is contraindicated in heart blocks, especially Mobitz II or third-degree AV block, because it can worsen the block and cause asystole.

Correct Answer is ["0.5"]

Explanation

Convert milligrams to micrograms.

1 mg = 1000 mcg.

0.05 mg × 1000 mcg/mg = 50 mcg

Desired dose = 25 mcg

Available dose = 50 mcg/tablet

Calculate the number of tablets.

Number of tablets = Desired dose / Available dose per tablet

= 25 mcg / 50 mcg/tablet

= 0.5

The nurse should administer 0.5 tablet.

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The nurse is caring for a client with a permanent pacemaker. The client's monitor shows a pacemaker spike prior to the p wave. What would be the nurse's best action?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

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Explanation

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