THROMBOTIC OCCLUSION OF THE ABDOMINAL AORTA

ASSOCIATED VISCERAL ARTERY LESIONS AND COLLATERAL CIRCULATION

¹ From the Department of Radiology, Diagnostic Section, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania

A group of 10 patients with abdominal aortic occlusion was studied by percutaneous transaxillary arteriographv. This technique proved to be a simple and safe method of demonstrating the level of occlusion, the associated visceral artery lesions, the collateral circulation and the distal runoff. The clinical symptoms and physical findings commonly encountered in this disease are briefly described. Associated visceral artery stenosis and/or occlusion occurred in 80 per cent of patients with aortic occlusion, and the renal arteries were the vessels most frequently affected. Two general sytems of collateral channels, the visceral and systemic pathways, develop in response to aortic occlusion. The arteriographic anatomy of some of these various pathways is presented and factors that determine why one may be dominant are discussed.

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