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 C
Explanation
The correct answer is choice C, frequent swallowing.
This indicates that the child may be experiencing hemorrhage because they are trying to clear the blood from their throat. Frequent swallowing is one of the initial signs of bleeding immediately after tonsillectomy.
Choice A is wrong because elevated pain level is not a specific sign of hemorrhage.
Pain is expected after a tonsillectomy and can be managed with medication and fluids.
Choice B is wrong because increased drowsiness is not a specific sign of hemorrhage.
Drowsiness can be caused by anesthesia, medication, or dehydration.
Choice D is wrong because diminished breath sounds are not a specific sign of hemorrhage.
Diminished breath sounds can be caused by respiratory infection, asthma, or bronchospasm.
Normal ranges for hemoglobin and hematocrit are 11.5 to 15.5 g/dL and 34 to 45% for children, respectively.
Normal ranges for platelet count are 150,000 to 450,000/mm3 for both children and adults.
Normal ranges for plasma clotting variables depend on the specific test and method used.
Correct Answer is C
Explanation
The correct answer is choice C. The nurse should ask the client what the voices are telling them, because this can help assess the client’s risk for harm to self or others, and also show empathy and respect for the client’s experience.
The nurse should not assume that the client’s hallucinations are related to medication noncompliance, as this can be perceived as accusatory and judgmental (choice A).
The nurse should not focus on the duration of the hallucinations, as this is not the priority at this time (choice B).
The nurse should not invalidate the client’s reality by stating that they do not hear anything, as this can cause mistrust and alienation (choice D).
The nurse should use therapeutic communication techniques to establish rapport and safety with the client who has schizophrenia.
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