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

Figure 3 Upper panel: Digital subtraction angiography anterior-posterior view, lateral view showing the blood flow increase ratio, and the anterior-posterior view in Case 1; and Lower panel: Case 2, same series. Pre-operative digital subtraction angiography in Cases 1 and 2 did not reveal blood flow to the operative side via the anterior communicating artery. In Case 1, a wide and slight increase was noted in the area in the middle cerebral artery territory. In Case 2, the increase was only noted in a part of the middle cerebral artery perfusion area; the rate of increase was high.