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
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
This is because glass ampules can leave small shards of glass in the solution, which can be harmful if injected into the client. A filter needle has a small mesh that traps any glass particles and prevents them from entering the syringe.
Choice B is wrong because the nurse should break the neck of the ampule away from the body to avoid injury from the glass.
Choice C is wrong because the nurse should use a different needle to inject the client after withdrawing the medication with a filter needle. This is to prevent contamination and reduce pain for the client.
Choice D is wrong because the nurse should dispose of the ampule in a sharps container, not in the trash can. This is to prevent injury and infection from the broken glass.
Correct Answer is {"A":{"answers":"A"},"B":{"answers":"B"},"C":{"answers":"B"},"D":{"answers":"B"},"E":{"answers":"B"}}
Explanation
The correct answer is choice A. Applying warm compresses to the incision site is anticipated for the client, as it can help reduce swelling and pain.
The other choices are contraindicated for the following reasons:
- Choice B: Maintaining bed rest for 2 days postoperatively is contraindicated, as it can increase the risk of complications such as deep vein thrombosis, pulmonary embolism, and pneumonia. The client should be encouraged to ambulate as soon as possible after surgery.
- Choice C: Irrigating indwelling urinary catheter with 50 mL of normal saline is contraindicated, as it can introduce bacteria into the bladder and cause infection. The catheter should be kept patent and draining without irrigation unless there is a specific order from the provider.
- Choice D: Administering enema to relieve constipation is contraindicated, as it can increase the pressure in the pelvic area and cause bleeding or damage to the surgical site. The client should be given stool softeners and laxatives to prevent constipation.
- Choice E: Placing a blanket roll under the client’s knees while in bed is contraindicated, as it can impair blood circulation and cause thrombophlebitis. The client should avoid flexing the knees excessively and elevate the legs slightly when lying down.
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