Abstract
The use of vasoactive agents to correct hypotension in horses is very common due to the use of inhalant anesthetics in surgical procedures that require more time and better adequacy of anesthetic plan in these animals. Inhalant anesthetics are most often responsible for causing hypotension during anesthesia in view of its ability to cause intense vasodilation, decrease in cardiac output and reduced sympathetic on the autonomic nervous system, thus decreasing peripheral vascular resistance. Therefore, the present study aimed to report the use of a continuous rate infusion of ephedrine for correction of trans-anesthetic hypotension in a cryptorchid horse undergoing orchiectomy, thus demonstrating its positive effects for correction of hypotension in horses, given that ephedrine is not the drug of choice in these species.