Excessive stimulation of the vagus nerve may result in:
a. Hypertension
b. Bradycardia
c. Tachycardia
d. Ventricular tachycardia
b
Rationale: a. Excessive vagal stimulation would result in hypotension
b. Correct. Stimulation of the vagus nerve results in the release of acetlycholine, the primary neurotransmitter of the parasympathetic nervous system. This results in opposition of the sympathetic nervous system and causes a decrease in the cardiac rate, or bradycardia
c. Stimulation of the vagus nerve would result in bradycardia
d. Stimulation of the vagus nerve results in asystole, not ventricular tachycardia
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