Question

Which of the following symptoms indicate(s) a vagal reaction to an iodinated intravenous contrast agent?

1. Bradycardia
2. Systolic pressure below 80 mm Hg
3. Diastolic pressure above 90 mm Hg
A. 1 only
B. 3 only
C. 1 and 2 only
D. 1 and 3 only

Answer 1

Symptoms that indicate a vagal reaction to an iodinated intravenous contrast agent include bradycardia and a systolic pressure below 80 mm Hg, making the correct answer C. 1 and 2 only.

Step-by-step explanation:

The symptoms that indicate a vagal reaction to intravenous contrast include both bradycardia and a systolic pressure below 80 mm Hg. A diastolic pressure above 90 mm Hg is not typically associated with a vagal reaction. Therefore, the correct answer to the question about the symptoms of a vagal reaction to an iodinated intravenous contrast agent is C. 1 and 2 only.

Vagal reactions are a part of the body's autonomic nervous system responses and can lead to a decrease in heart rate and blood pressure. In the case of a vagal reaction to contrast media, the body might exhibit signs of a parasympathetic response, including bradycardia and hypotension (low systolic blood pressure). These symptoms are consistent with a decrease in the firing rates of baroreceptors and a deceleration of the sympathetic nervous system.