Correct Answer: A

Rationale: The correct answer is A: First-degree atrioventricular block. This dysrhythmia is characterized by a constant P-R interval of greater than 0.20 seconds (0.35 seconds in this case). In first-degree AV block, all electrical impulses from the atria to the ventricles are conducted, but the conduction time is prolonged. This results in a delay in the electrical signal passing through the AV node, leading to the prolonged P-R interval.


Choice B: Complete heart block would show a lack of conduction between the atria and ventricles, resulting in a dissociation between P waves and QRS complexes.

Choice C: Premature atrial complexes are early, abnormal electrical impulses originating in the atria.

Choice D: Atrial fibrillation is characterized by chaotic, rapid electrical activity in the atria leading to an irregularly irregular ventricular response.

In summary, the client is displaying first-degree AV block due to the prolonged and constant P-R

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