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Operation for discrete subvalvular aortic stenosis.

T Cain, D Campbell, B Paton

    The Journal of Thoracic and Cardiovascular Surgery
    |March 1, 1984
    PubMed
    Summary
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    Discrete subvalvular aortic stenosis surgery has a high recurrence rate. Aortoventriculoplasty is recommended for definitive reoperation when aortic insufficiency or tunnel stenosis are present.

    Area of Science:

    • Cardiology
    • Pediatric Cardiology
    • Cardiac Surgery

    Background:

    • Discrete subvalvular aortic stenosis is a congenital heart defect.
    • Surgical intervention is necessary to relieve obstruction and prevent complications.

    Purpose of the Study:

    • To evaluate the long-term outcomes of surgical management for discrete subvalvular aortic stenosis.
    • To identify factors associated with recurrence and guide reoperative strategies.

    Main Methods:

    • Retrospective review of 37 patients (31 children, 6 adults) who underwent surgery for discrete subvalvular aortic stenosis over 20 years.
    • Comparison of outcomes between membrane resection alone (pre-1975) and membrane resection with left ventricular myectomy (post-1975).
    • Analysis of recurrence rates, need for reoperation, and effectiveness of different surgical approaches.

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    Main Results:

    • Overall recurrence rate was 30% (11 patients), with an average gradient of 63 mm Hg.
    • Patients undergoing reoperation for recurrence often had persistent symptoms or gradients.
    • Aortoventriculoplasty emerged as a potentially definitive reoperative procedure for specific complications.

    Conclusions:

    • Significant recurrence of discrete subvalvular aortic stenosis can be anticipated despite surgical intervention.
    • Progressive aortic insufficiency and tunnel stenosis are common complications if initial relief is inadequate.
    • Aortoventriculoplasty should be considered the definitive reoperative procedure in cases of aortic insufficiency and/or tunnel stenosis.