“…Cardiac angiography and intravenous urog raphy also result in significant adverse reactions. 12,14,16,17,29,65,72,73,93,128,155,156,183 The other proce dures result in relatively milder and less frequent adverse reactions. 12,19,30,31,35,38,51,100,132,165,175,189 Undoubtedly the pathophysiology of these contrast media-induced reactions are complex and may not be related to a single pathway.…”