DIAGNOSIS OF ARTERIOPORTAL FISTULAE IN FOUR DOGS USING COMPUTED TOMOGRAPHIC ANGIOGRAPHY

Authors

  • A. L. ZWINGENBERGER,

    1. From the Department of Clinical Studies-Philadelphia, Matthew J. Ryan School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey Street, Philadelphia, PA 19104-6010.
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  • R. C. McLEAR,

    1. From the Department of Clinical Studies-Philadelphia, Matthew J. Ryan School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey Street, Philadelphia, PA 19104-6010.
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  • C. WEISSE

    1. From the Department of Clinical Studies-Philadelphia, Matthew J. Ryan School of Veterinary Medicine, University of Pennsylvania, 3900 Delancey Street, Philadelphia, PA 19104-6010.
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Address reprint requests to A. L. Zwingenberger, at the above address.
E-mail: azwingen@vet.upenn.edu

Abstract

Arterioportal fistulae are rare congenital anomalies of the hepatic vasculature. Diagnosis is conventionally made by selective angiography or ultrasonography. This report describes use of a dual-phase computed tomographic (CT) angiographic technique to diagnose arterioportal fistulae in four dogs. Advantages of this method include a noninvasive peripheral injection of contrast medium, ability to diagnose multiple acquired extrahepatic shunts, and observation of hemodynamic changes such as hepatofugal blood flow and reduced circulation to the caudal abdomen. The hepatic vasculature including arteries, veins, and portal veins can be completely evaluated. Dual-phase CT angiography is a safe and minimally invasive method of diagnosing arterioportal fistulae in dogs.

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