Evaluation of changes of intracranial blood flow after carotid artery stenting using digital subtraction angiography flow assessment

Figure 4 Upper panel: Digital subtraction angiography anterior-posterior view, lateral view showing the blood flow increase ratio, and the anterior-posterior view in Case 3; and Lower panel: Case 4, same series. Pre-operative digital subtraction angiography in Cases 3 and 4 revealed blood flow to the operative side via the anterior communicating artery. A wide and uniform increase in the area in the middle cerebral artery territory was noted in Case 3. In Case 4, the increase was only noted in a part of the middle cerebral artery perfusion area, especially in the basal ganglia; the rate of increase was high.