A nurse is reviewing a client's cardiac rhythm strips and notes a constant P-R interval of
0.35 seconds. Which of the following dysrhythmias is the client displaying?
Premature atrial complexes
Complete heart block
Atrial fibrillation
First-degree atrioventricular block
The Correct Answer is D
A. Incorrect. Premature atrial complexes do not typically affect the P-R interval. They are characterized by an early P-wave followed by a QRS complex.
B. Incorrect. Complete heart block is characterized by a dissociation between the P-waves and QRS complexes, resulting in no relationship between atrial and ventricular activity.
C. Incorrect. Atrial fibrillation is characterized by chaotic and irregular atrial activity without distinct P-waves, making the P-R interval irrelevant.
D. Correct. In first-degree atrioventricular block, the P-R interval is prolonged beyond the normal range of 0.12-0.20 seconds. A constant P-R interval of 0.35 seconds indicates a first- degree atrioventricular block.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Incorrect. Placing a towel roll under the client's neck is a preventive measure to maintain proper cervical alignment, but it does not specifically address contracture prevention.
B. Incorrect. This can promote flexion of the knees, which may actually contribute to knee flexion contractures over time. While it might be comfortable for the client, it's not a preventive measure against contractures.
C. Correct. Orthotics can help maintain proper alignment of the foot and ankle, preventing foot drop and other related contractures. They are designed to support joints and muscles, minimizing the risk of stiffness and contracture formation.
D. Incorrect. Aligning a trochanter wedge between the client's legs might help prevent external rotation of the hips but does not specifically address contracture prevention.
Correct Answer is A
Explanation
A. Correct. Donepezil is a medication used to treat Alzheimer's disease and is expected to improve cognitive function, including short-term memory.
B. Incorrect. Donepezil is not typically associated with changes in food intake.
C. Incorrect. While improved functional ability is a goal of treatment, performing ADLs independently might not be solely indicative of donepezil's effectiveness.
D. Incorrect. Donepezil is primarily focused on improving cognitive function rather than mood enhancement.
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