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Left Ventricular Dysfunction after Closure of Large Patent Ductus Arteriosus

Cardiovascular Department, King Faisal Specialist Hospital and Research Center, Jeddah, Saudi Arabia

For reprint information contact: M Omar Galal, MD Tel: 966 2 667 7777 Fax: 966 2 663 9581 Email: ogalal{at}yahoo.com, Cardiovascular Department, MBC J 16, King Faisal Specialist Hospital and Research Centre, P.O. Box 40047, Jeddah 21499, Saudi Arabia.

Changes in left ventricular dimensions and performance were studied in 43 patients after transcatheter occlusion or surgical ligation of patent ductus arteriosus. The patients were assigned to 2 groups based on their ductal diameter: 3.1 mm to group A (n = 27) and 3 mm to group B (n = 16). The mean age and weight of the groups were comparable. Before intervention, group A had a significantly larger mean left ventricular end-diastolic diameter than group B, while all patients had normal shortening fraction and ejection fraction. Within 1 month after intervention, left ventricular end-diastolic diameter showed a trend towards regression while shortening fraction and ejection fraction decreased significantly in group A. There were no significant changes in these parameters in group B. Between 1 and 6 months after intervention, left ventricular performance improved in most of the group A patients who were followed up. We conclude that closure of large ductus arteriosus in children leads to significant immediate deterioration of left ventricular performance, which appears to recover within a few months. Echocardiographic study before hospital discharge is recommended in these patients. Serious deterioration of ventricular performance after closure may warrant the use of angiotensin converting enzyme inhibitors.

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