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Ann Thorac Surg 1995;59:67-73
© 1995 The Society of Thoracic Surgeons

The Fate of Homograft Conduits in Children With Congenital Heart Disease: An Angiographic Study

Mubadda A. Salim, MD, Thomas G. DiSessa, MD, Bruce S. Alpert, MD, Kristopher L. Arheart, EdD, William M. Novick, MD, Donald C. Watson, Jr, MD

Division of Cardiology, Department of Pediatrics, Division of Cardiothoracic Surgery, Department of Surgery, and Department of Biostatistics and Epidemiology, The University of Tennessee, Memphis, Tennessee

Accepted for publication June 14, 1994.

The use of homograft conduits in the repair of congenital heart disease is widely accepted. We reviewed the catheterization and angiographic data from 20 patients with homograft conduits. All conduits were to the pulmonary arteries. The age at operation was 4.7 ± 5.6 years (mean ± standard deviation) and at follow-up catheterization, 7.8 ± 6.7 years. At implantation, conduit cross-sectional area and Z value were 219 ± 96 mm2 and 3.5 ± 1.8, respectively. At subsequent catheterization, the conduit diameters were measured in two projections at the shaft, annulus, valve opening, and insertion into the pulmonary artery. The transconduit gradient was 47 ± 26 mm Hg. The cross-sectional areas were 149 ± 56 mm2 at the shaft, 151 ± 92 mm2 at the annulus, 108 ± 116 mm2 at the valve opening, and 127 ± 84 mm2 at the pulmonary artery insertion. The Z values were -0.9 ± 2.5, -0.9 ± 2.8, -3.8 ± 4.0, and -2.0 ± 3.4, respectively. The cross-sectional areas and the Z values at the levels of measurement were significantly smaller than the corresponding values at implantation. The change in cross-sectional areas and Z values exceeded what would be expected from growth alone. These data indicate that there is a decrease, with time, in the functional lumen of homograft conduits, and this may have implications for follow-up strategy after implantation.




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