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Pulmonary artery banding
Insights
Pulmonary artery banding effectively manages congenital heart defects with excessive blood flow in infants. A new formula simplifies band sizing, improving symptom control and avoiding complex pressure measurements.
Area of Science:
- Pediatric Cardiology
- Congenital Heart Disease Surgery
Background:
- Congenital heart defects often cause excessive pulmonary blood flow, necessitating interventions.
- Pulmonary artery banding has been used for palliation in these cases.
Purpose of the Study:
- To evaluate the efficacy and safety of pulmonary artery banding in infants with congenital heart defects.
- To introduce a simplified method for determining pulmonary artery band circumference.
Main Methods:
- Retrospective analysis of 209 children undergoing pulmonary artery banding (1972-1982).
- Development and application of a formula to estimate initial band circumference based on weight and defect type.
- Monitoring for cyanosis or bradycardia to guide band loosening.
Main Results:
- A simplified formula for band circumference was developed for infants with ventricular septal defects.
- The formula accounts for intracardiac mixing disorders.
- The method allowed predictable control of congestive symptoms and pulmonary hypertension, avoiding direct pulmonary artery pressure monitoring.
Conclusions:
- Pulmonary artery banding is an effective palliative procedure for infants with congenital heart disease and excessive pulmonary blood flow.
- The simplified sizing formula facilitates predictable management and reduces procedural complexity.
- Operative mortality is generally low, varying with defect complexity and associated conditions.
Abstract:
Two hundred nine children with congenital heart defects characterized by excessive pulmonary blood flow underwent pulmonary artery banding at The Hospital for Sick Children from January, 1972, through December, 1982. The indications for banding, rather than complete repair, varied with the type of cardiac defect as well as with the year of presentation to our hospital. A simplified method of estimating required band circumference has been developed for infants with ventricular septal defect, with or without major intracardiac mixing disorders. Infants with simple defects without intracardiac bidirectional mixing disorders receive a band at a circumference of 20 mm + 1 mm for each kilogram of body weight, whereas infants with bidirectional mixing disorders receive a band at a circumference of 24 mm + 1 mm for each kilogram of body weight. The overall operative mortality varies with the underlying cardiac defect and with associated medical conditions but is relatively low in the less-complicated cases. The use of a formula to predict a starting band circumference, with loosening only as required by cyanosis or bradycardia, allows predictable control of congestive symptoms and pulmonary hypertension in the majority of infants. The cumbersome measurement of pulmonary artery pressure and the unpredictable changes in pressure during anesthesia are avoided. Pulmonary artery banding remains an effective means of achieving satisfactory palliation in infants with congenital heart disease and excessive pulmonary blood flow.