A comparison between iohexol and metrizamide, two nonionic contrast media, in aorto-femoral angiography

Iohexol, a recently developed non-ionic contrast medium, is shown to be well tolerated on aorto-femoral angiography. The aortic injection of 40 ml of iohexol (350 mg I/ml) was usually associated with a moderate sensation of heat and an absence of pain. A transient fall in blood pressure, no different from that resulting from metrizamide, was associated with some increase in heart rate.