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
Atrial fibrillation.
Complete heart block
First-degree atrioventricular block
Premature atrial complexes
The Correct Answer is C
- . Answer and explanation.
The correct answer is choice C, first-degree atrioventricular block.
This is because the PR interval is longer than normal, which indicates a delay in the conduction of electrical impulses from the atria to the ventricles through the AV node. A normal PR interval is 0.12 to 0.2 seconds, or 3 to 5 small squares on the EKG strip.
In this case, the PR interval is 0.35 seconds, which is more than 5 small squares.
Choice A is wrong because atrial fibrillation is a type of arrhythmia where the atria beat irregularly and rapidly, producing chaotic and variable P waves and an irregular ventricular response.
There is no constant PR interval in atrial fibrillation.
Choice B is wrong because complete heart block is a type of arrhythmia where there is no conduction of electrical impulses from the atria to the ventricles, resulting in independent and dissociated atrial and ventricular rhythms.
There are no consistent P waves or PR intervals in complete heart block.
Choice D is wrong because premature atrial complexes are extra beats that originate from the atria and interrupt the normal sinus rhythm.
They produce abnormal P waves that are different from the sinus P waves, and may have a shorter or longer PR interval depending on the timing of the impulse.
However, they do not cause a constant prolongation of the PR interval.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Correct Answer is A
Explanation
Choice A reason:
Eating 1 g/kg of protein per day is the appropriate recommendation. When providing discharge teaching to a client with chronic kidney disease (CKD) who is receiving haemodialysis, the nurse should include the instruction to eat an appropriate amount of protein, which is usually recommended at a specific daily intake based on the client's weight.
Clients with CKD often have dietary restrictions, including limiting protein intake to reduce the workload on the kidneys. However, protein intake is still necessary for maintaining muscle mass and overall health. The recommended protein intake for clients with CKD undergoing haemodialysis is typically around 1 gram of protein per kilogram of body weight per day.
Choice B reason:
Drink at least 3 L of fluid daily. Clients receiving haemodialysis typically have fluid restrictions, as impaired kidney function can lead to fluid retention and electrolyte imbalances. The specific fluid allowance will be determined by the healthcare provider based on the client's individual needs, and it may be significantly less than 3 L per day.
Choice Doption
Take magnesium hydroxide for ingestion. Magnesium hydroxide is a laxative and antacid used to relieve constipation and heartburn. It is not typically prescribed for clients with chronic kidney disease, especially without proper evaluation of their kidney function and overall medical condition.
Choice Coption:
C. Consume foods high in potassium.
Clients with chronic kidney disease, especially that undergoing haemodialysis, often need to restrict potassium intake. Impaired kidney function can lead to the build-up of potassium in the blood, which can be harmful. Therefore, it is essential for clients with CKD to avoid or limit foods high in potassium.
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