The nurse identifies the following rhythm on the cardiac monitor. Which treatment modality will the nurse anticipate for this client?
Radiofrequency ablation
Administration of amiodarone
insertion of a pacemaker
Administration of adenosine
The Correct Answer is C
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. "All patients with this disorder have a genetic defect which causes it.": Restrictive cardiomyopathy is not primarily a genetic disorder. While there may be rare familial forms, most cases are acquired, often secondary to systemic diseases, making this statement inaccurate and misleading.
B. "There are many theories about its development but amyloidosis in your history is a probable cause.": This is the most accurate response. Restrictive cardiomyopathy is commonly associated with infiltrative diseases such as amyloidosis, hemochromatosis, and sarcoidosis, which impair ventricular filling due to stiff, non-compliant myocardium.
C. "You probably had a silent heart attack which caused this disorder.": Silent myocardial infarctions can contribute to ischemic cardiomyopathy, typically leading to dilated, not restrictive, changes in the myocardium. They are not a primary cause of restrictive cardiomyopathy.
D. "Your long-standing hypertension caused this disorder.": Chronic hypertension more commonly leads to left ventricular hypertrophy and may contribute to diastolic heart failure, but it is not a typical cause of restrictive cardiomyopathy.
Correct Answer is C
Explanation
A. Administer an antidiarrheal medication: Atropine is an anticholinergic agent that reduces gastrointestinal motility, often leading to constipation rather than diarrhea. Administering an antidiarrheal would not be appropriate and could cause harmful effects if unnecessary.
B. Assess the pupils for constriction: Atropine causes pupil dilation (mydriasis), not constriction. Checking for constriction would not align with the expected pharmacologic effects of the drug and is not a priority assessment after administration.
C. Provide frequent oral care: Atropine inhibits secretions as part of its anticholinergic effects, often leading to dry mouth (xerostomia). Frequent oral care helps maintain mucous membrane integrity and client comfort, making this an appropriate nursing action following administration.
D. Insert an indwelling catheter: Although atropine can cause urinary retention, especially in older adults, catheter insertion is not routinely required after administration; a single 0.5 mg IV dose is less likely to cause significant urinary retention requiring catheterization. It should only be considered if the client shows clinical signs of acute urinary retention.
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