FIG 2. Patient 7: 45-year-old woman with stroke.

A, Right internal carotid arteriogram shows tight stenosis with ulceration in the M1 segment.

B, Saved roadmap fluoroscopic image shows a dilated balloon at the stenotic site.

C, Angiogram obtained after angioplasty shows a focal spasm at the distal end of the balloon position (arrow).

D, Final angiogram obtained after nitroglycerin infusion shows no further spasm and improved flow into the MCA.