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European Journal of Cardio-Thoracic Surgery, Vol 5, 378-382, Copyright © 1991 by European Association for Cardio-thoracic Surgery

ARTICLES

Surgery for critical congenital aortic stenosis during the first three months of life

BJ Messmer, R Hofstetter and G von Bernuth
Department of Thoracic and Cardiovascular Surgery, Clinics of RWTH, Aachen, FRG.

Open commissurotomy for critical aortic stenosis has been performed in a consecutive series of 28 neonates and infants below 3 months of age (average age 1 month) including 5 patients with severe organic mitral valve disease in need of concomitant correction. In the majority of cases, aortic stenosis was due not only to fused commissures but also to excessive immature valve tissue protruding into the valve area. Therefore a technique of extended commissurotomy has been adopted resecting such nodules responsible for a secondary level stenosis. All operations were done under deep hypothermia (17 degrees C), circulatory arrest (33 +/- 11 min) and cardioplegia using the Bretschneider solution (35-50 ml/kg). Hospital mortality was 18% (5) including 1 infant dying at 2 months of thrombosed mitral prosthesis inserted at a secondary operation. Severe organic mitral valve disease proved to be the only significant risk factor for early mortality. During the follow- up period of up to 10 years (average 5 years), 1 child with a hypoplastic left heart died and 2 children had to undergo reoperation for residual and recurrent stenosis, respectively. Actuarial survival for the present series is 78% at 10 years while reoperation free survival for the aortic valve is 64%. It is concluded that careful and if necessary extended open commissurotomy still represents the method of choice in this age group. Alternative methods such as transventricular or percutaneous dilatation did not show a lower risk until now and long-term results are not convincing as yet.

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