Pulmonary hypertension occurs in patients with congenital heart disease and may be caused by increased volume of pulmonary blood flow or by anatomical changes in the pulmonary vasculature. Therefore, the determination of pulmonary vascular resistance expresses the status of the pulmonary vascular bed more accurately than does the level of the pulmonary artery pressure alone. Knowledge of the anatomical changes in pulmonary vessels is important in assessing surgical indications and operative risks.
Bibliographical noteFunding Information:
From the Departments of Surgery and Pediatrics, University of Minnesota Health Sciences Center, Minneapolis, Minn. Supported in part by U.S. Public Health Service Grant No. 5 TIPHE 05914. Address reprint requests to Dr. Castaneda, Department of Cardiac Surgery, The Children's Hospital Medical Center, 300 Longwood Avc., Ibton, Mass. 021 15.