RN-ATI-Fundamentals-of-Nursing-2023-2024 -Nurselytic

Correct Answer: A

Rationale: The correct answer is A: First-degree atrioventricular block. A constant P-R interval of 0.35 seconds indicates a delay in the conduction of electrical impulses from the atria to the ventricles. In first-degree AV block, the delay causes a prolonged P-R interval, which is consistent with the 0.35 seconds observed. This dysrhythmia is characterized by a consistent delay but all atrial impulses are conducted to the ventricles.

B: Complete heart block would show a lack of association between P waves and QRS complexes, with no relationship between atrial and ventricular activity.

C: Premature atrial complexes are early electrical impulses originating in the atria, resulting in abnormal P waves and irregular rhythm, not a constant P-R interval.

D: Atrial fibrillation is characterized by chaotic electrical activity in the atria, leading to an irregularly irregular ventricular response, not a constant P-R interval.

Correct Answer:

Rationale:

Correct Answer:

Rationale:

Correct Answer:

Rationale:

Correct Answer:

Rationale: