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
The correct answer is choicea. Maternal hypoglycemia.
Choice A rationale:
Maternal hypoglycemia can lead to decreased glucose availability for the fetus, which can result in fetal bradycardia.The fetus relies on maternal glucose for energy, and a significant drop in maternal glucose levels can affect the fetal heart rate.
Choice B rationale:
Maternal fever is typically associated with fetal tachycardia rather than bradycardia.An elevated maternal temperature can increase the fetal heart rate as the fetus attempts to regulate its own temperature.
Choice C rationale:
Chorioamnionitis, an infection of the amniotic fluid and membranes, is also more commonly associated with fetal tachycardia due to the inflammatory response and fever.
Choice D rationale:
Fetal anemia can cause fetal tachycardia as the fetus compensates for the reduced oxygen-carrying capacity of the blood.Bradycardia is not a typical response to fetal anemia.
Correct Answer is ["B","C","D"]
Explanation
The nurse should give the client one simple direction at a time, reinforce orientation to time, place, and person, and establish eye contact when communicating with the client.
These interventions can help the client with dementia to understand and follow instructions, reduce confusion and anxiety, and enhance communication.
Choice A is wrong because allowing the client to choose among a variety of activities each day can overwhelm and frustrate the client with dementia.
The nurse should provide a structured and consistent daily routine for the client.
Choice E is wrong because refuting the client’s delusions using logic can increase the client’s agitation and distrust.
The nurse should use validation therapy to acknowledge the client’s feelings and emotions without arguing or correcting the client.
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