A vasoactive is a pharmaceutical agent that has the effect of either increasing or decreasing blood pressure and/or heart rate. Typically used in a setting where a patient has the blood pressure and heart rate monitored constantly, vasoactive drug therapy is typically `titrated` to achieve a desired effect or range of values as determined by com.....
exerting an effect upon the calibre of blood vessels.
Describes something that causes the blood vessels to constrict (get narrower) or dilate (get wider).
Exerting an effect upon the calibre of blood vessels. ... (18 Nov 1997) ... 
(va″zo-) (vas″o-ak´tiv) exerting an effect upon the caliber of blood vessels.
Type: Term Pronunciation: vā′sō-ak′tiv, vas-ō- Definitions: 1. Influencing the tone and caliber of blood vessels.