Abstract
In a double blin cross-over study the non ionic, water soluble contrast medium iohexol has been compared to Urografin Meglumine by angiography in common carotid artery and vertebral artery. More subjective adverse effects were generally seen with Urografin than with iohexol and statistically there were significantly less changes in heart rate after iohexol but no significant changes in the intra-arterial recorded blood pressure.

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