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Thoracic Compliance and Lung Volumes in Children with Heart Disease

Static thoracic compliance and its components, static lung compliance and static thoracic wall compliance were measured in children with congenital heart disease during early anaesthesia. In relation to values obtained in normal children under similar conditions, total and lung compliance were low in patients with Tetralogy of Fallot, transposition of the great vessels and atrial septal defects. No correlation could be found between low lung compliance and changes in pulmonary artery pressure, pulmonary vascular resistance, the size of the shunt, or lung volume. Intimal fibrosis described in cases subjected to Blalock shunt procedures before definitive correction may contribute to the low lung compliance.