DISCRETE SUBVALVULAR AORTIC-STENOSIS - EVALUATION OF OPERATIVE THERAPY

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  • 1 January 1977
    • journal article
    • research article
    • Vol. 74  (3) , 352-361
Abstract
Angiocardiographic and operative observations support the validity of classifying the spectrum of congenital subvalvular aortic stenosis into a membrane, fibromuscular collar and tunnel. The current operative method is to excise a thin membrane of thick fibrous ridge and, if a fibromuscular collar or tunnel is identified, to effect a left ventricular myomectomy as described by Morrow for hypertrophic subaortic stenosis. Data from experience with 35 children indicate that this approach is effective and safe. Gradients are substantially reduced and residual obstruction acceptable. Successive clinical evaluaitons (100% of 33 survivors) over an interval of 1-13 yr (mean of 6) affirm that amelioration of the obstruction endures.