angiotensin sensitivity test
Also found in: Dictionary, Encyclopedia.
angiotensin sensitivity test (AST)
a test for sensitivity to angiotensin II by infusion of angiotensin II amide into the right cubital vein. Angiotensin is metered in doses that increase by 1 ng/kg/min at 5-minute intervals. A positive AST result is an effective pressor dose, or one that causes a 20 mm Hg rise in diastolic blood pressure at an infusion rate of less than 10 ng/kg/min.