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Successful repair of an atrial septal defect associated with right to left shunting.
  1. K F Hossack,
  2. J C Tewksbury,
  3. L M Reid
  1. Department of Medicine, University of Colorado Health Sciences Center, Denver 80204.

    Abstract

    An atrial septal defect was successfully repaired in a young woman despite the presence of pulmonary hypertension and right to left shunting. Before repair both isoprenaline infusion and 100% inspired oxygen produced significant falls in pulmonary artery pressure and pulmonary vascular resistance. A lung biopsy specimen at operation indicated a considerable decrease in the concentration of parenchymal pulmonary arteries and an absence of intimal fibrosis or medial hypertrophy. Pulmonary artery banding performed in infancy, as part of the management of a ventricular septal defect, may have contributed to the underdevelopment of the pulmonary vascular tree. The reduced number of pulmonary arteries is a possible explanation for the pulmonary hypertension.

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