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J Thorac Cardiovasc Surg 1994;107:1262-1271
© 1994 Mosby, Inc.

SURGERY FOR CONGENITAL HEART DISEASE

Early and late results of mitral valve repair in children

Los Angeles, Calif.

From the University of California at Los Angeles School of Medicine, Division of Cardiothoracic Surgery, Los Angeles, Calif.

Address for reprints: Hillel Laks, MD, Professor and Chief, Division of Cardiothoracic Surgery, 10833 Le Conte Ave., Rm. 62-182, Los Angeles, CA 90024-1741.

Abstract

Mitral valve repair in children has the advantage of avoiding mitral valve replacement with its attendant need for anticoagulation and reoperation. Seventy-nine children between the ages of 2 months and 17 years (mean 4.9 years) underwent mitral valve repair between May 1982 and April 1993. There were five patients with mitral stenosis and 74 patients with mitral regurgitation, and 19 children were less than 2 years of age. Patients were divided into anatomic subgroups on the basis of the primary cardiac pathologic condition. Forty-three had severe mitral regurgitation, 21 had moderate mitral regurgitation, and 12 patients with primum atrial-septal defect and 2 patients with univentricular hearts had minimal to moderate mitral regurgitation. Associated cardiac anomalies were present in 68 patients and 85% of the patients required concomitant intracardiac procedures. The methods of mitral valve repair included annuloplasty in 68 (86%), repair of cleft leaflet in 41 (52%), chordal shortening in 9 (11%), triangular leaflet resection in 8 (10%), splitting of papillary muscles with resection of subvalvular apparatus in 7 (9%), and chordal substitution in 1 (1%). The technique of annuloplasty was modified to allow for annular growth. Follow-up was available from 1 to 10 years (mean 4 ± 2.5 years). There were three early deaths (4%), all occurring as a result of low output cardiac failure in patients with minimal postoperative mitral regurgitation. Three late deaths (4%) occurred in patients with persistent moderate to severe mitral regurgitation and progressive cardiac failure and eight patients (10%) required either rerepair or replacement of the mitral valve. Actuarial survival was 94% at 1 year, 84% at 2 years, and 82% at 5 years, and actuarial freedom from reoperation was 89% at 8 years. All patients received postoperative echocardiography with 82% having minimal to no mitral regurgitation and 98% of long-term surviving patients being free of symptoms. We conclude that mitral valve repair can be done with low early and late mortality. The need for reoperation is relatively low and valve growth has occurred with the use of a modified annuloplasty. (J THORACCARDIOVASCSURG1994;107:1262-71)

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