Whitton DL & Trim CM
Use of dopamine hydrochloride during general anesthesia in the treatment of advanced atrioventricular heart block in four foals.

J Am Vet Med Assoc, 187(12): 1357-1361, 1985
ISSN: 0003-1488 Journal of the American Veterinary Medical Association (PubMed)

Abstract
Heart block is a relatively common arrhythmia in the adult horse. It may be a normal physiologic phenomenon or it may have pathologic implication. Four foals in which advanced heart block developed during anesthesia were unresponsive to atropine sulfate and supportive treatment alone. Resolution of the heart blocks was achieved after the addition of dopamine hydrochloride to the therapeutic regimen.