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Overactivity or irritability of the vagus nerve, adversely affecting function of the blood vessels, stomach, and muscles.

va′go·ton′ic (-tŏn′ĭk) adj.


(Pathology) of or relating to vagotonia
References in periodicals archive ?
However, the vagotonic effect of cholinesterase inhibitors might also protect the heart against ischemia and dysarrhythmias.
Propofol causes hypotension due to its vagotonic effect and fentanyl inhibits baroreceptor reflex.
The onset of asystole during expiration may be an extreme example of a normal respirophasic sinus arrhythmia in a vagotonic subject; however, that does not appear to be a sufficient explanation, as asystole could not be reproduced by breath-holding without concomitant use of the inhalers.
The cardiac glycosides in Nerium oleander have vagotonic effects, resulting in bradycardia and heart block.