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

Answer and Explanation

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.

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Correct Answer is C

Explanation

Choice A reason:

Arching should not be expected. Arching of the body is not a typical manifestation of bacterial pneumonia. It may be seen in infants with certain conditions such as abdominal pain or neurologic issues, but it is not specific to pneumonia.

Choice B reason:

Drooling should not be expected. Drooling is not a common manifestation of bacterial pneumonia. It may be seen in certain conditions affecting the throat or mouth, but it is not directly related to pneumonia.

Choice C reason:

Fever is the correct answer. Bacterial pneumonia is an infection in the lungs caused by bacteria. When a child has bacterial pneumonia, their body's immune system responds to the infection, leading to inflammation and fever.

Choice D reason:

Steatorrhea should not be expected. Steatorrhea refers to fatty, bulky, and foul-smelling stools and is not associated with bacterial pneumonia. Steatorrhea may be seen in conditions affecting the gastrointestinal system and fat absorption.

Choice E reason:

Tinnitus should not be expected. Tinnitus is the perception of noise or ringing in the ears and is not a typical manifestation of bacterial pneumonia. Tinnitus can be associated with various ear-related conditions or medication side effects, but it is not directly related to pneumonia.

A. Atrial fibrillation B. First-degree AV block C. Premature ventricular contraction D. Sinus bradycardia

Correct Answer is B

Explanation

The correct answer is B.

Choice A reason: Atrial fibrillation is characterized by a rapid, irregular heartbeat and an absence of distinct P waves on the ECG, which is not indicated by the information provided.

Choice B reason: First-degree AV block is indicated by a prolonged PR interval without affecting the overall heart rate, aligning with the client’s PR interval of 0.24 seconds.

Choice C reason: Premature ventricular contraction would show an abnormal QRS complex on the ECG, which is not mentioned in the scenario.

Choice D reason: Sinus bradycardia is defined by a heart rate less than 60 bpm, which does not apply here as the client’s heart rate is 69/min, within the normal range of 60-100 bpm.

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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

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Naxlex Comprehensive Predictor Exams

A nurse is assessing a child who has bacterial pneumonia. Which of the following manifestations should the nurse expect?

Correct Answer is C

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Correct Answer is B

Explanation

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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