0% in cerebral and vertebral angiography but when hyperosmolar iodinated contrast agents are used the rates can be as high as 4%.
Transient cortical blindness first reported in 1970 following coronary angiography is an uncommon complication of cerebral and vertebral angiography.
412 The highest incidence has been reported after selective vertebral angiography.
Although transient cortical blindness is a known complication of cerebral and vertebral angiography with occurrence rate as high as 1% to 4%, it is very rare after angiography of coronary arteries and bypass grafts.
Similar multiple hypodense lesions in right occipital lobe, thalamus and left cerebellar hemisphere regions have been reported by Till et al on CT and MRI scans of their patient who developed transient cortical blindness without any abrupt rise in blood pressure following vertebral angiography.
The highest incidence of transient cortical blindness has been reported after selective vertebral angiography and risk is higher with non-ionic contrast agent.