A comparison of normal intraarterial digital subtraction angiography with standard angiography in patients with symptomatic cerebrovascular ischemia.

The association between carotid artery disease, transient ischemic attack (TIA), and stroke has been recognized for many years. There still appears to be some controversy over the accuracy of lesion detection with intraarterial digital subtraction angiography (IADSA) as compared with film screen technique. We describe a prospective study that took place over a period of nearly 4 years with 30 consecutive, symptomatic patients who were referred to us for angiography. We compared IADSA with film screen carotid angiograms of the implicated side.