ATI Pharmacology Nur 20500 | Nurselytic

Correct Answer: C

Rationale: The correct answer is C: Heart rate 46/min. Atenolol is a beta-blocker that primarily works by slowing down the heart rate. A heart rate of 46/min indicates bradycardia, which is a potential adverse effect of atenolol. This finding suggests that the client's heart rate is already low, and administering atenolol could further decrease it to dangerous levels, leading to symptoms like dizziness, fatigue, or even heart failure.
The other choices are incorrect because:
A: Respiratory rate 18/min - Normal respiratory rate.
B: Oxygen saturation 95% - Normal oxygen saturation.
D: Blood pressure 160/94 mm Hg - Although high, it is not a contraindication for atenolol administration.
In summary, the client's low heart rate of 46/min is the key indicator to withhold atenolol to prevent further bradycardia and associated complications.

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