(physiology, medicine) Active on vessel walls, that is, causing either constriction or dilation of a blood vessel, thus affecting hemodynamics (blood flow). Vasoactive substances may be endogenous (for example, endogenous angiotensin, vasopressin, or epinephrine) or exogenous (for example, pharmaceutical vasopressin or epinephrine).
Related Words
Related dictionary entries include vasofactive, vasodilative, vasopressive, vasodilatative, vasoconstrictory, vasoconstrictive.