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FIG 2. Intravenous digital subtraction angiograms, anteroposterior views, obtained in animals from each group.
A, Sham group, 4 weeks after surgery. No aneurysm cavity is present at the stump of the right CCA (arrowhead). The parent artery (curved arrow) is not significantly dilated. Contrast enhancement within the persistent left superior vena cava is darker than arterial contrast enhancement because of stasis in the venous structure (straight arrow).
B–D, Low-dose (25% elastase, 10 minutes) (B), medium-dose (50% elastase, 10 minutes) (C), and high-dose (50% elastase, 10 minutes) (D) groups, 21 days after surgery. Brachiocephalic arteries are opacified, including the left CCA (open arrow); right subclavian artery (straight solid arrow); and aneurysm cavity, ie, aneurysmal dilatation of the right CCA origin (arrowhead). In B, the parent artery (curved solid arrow) is not dilated. In C, the parent artery (curved solid arrow) is slightly dilated compared with that in A and B. In D, the proximal and distal parent arteries (curved solid arrow) are remarkably dilated compared with those in A and B.
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