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Accessory mitral valve tissue causing left ventricular outflow tract obstruction.

W G Meldrum-Hanna, T B Cartmill, R E Hawker

    British Heart Journal
    |April 1, 1986
    PubMed
    Summary
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    Accessory mitral valve tissue can cause left ventricular outflow tract obstruction in children, a rare condition. Surgical excision of this tissue successfully relieved the obstruction in all described cases.

    Area of Science:

    • Pediatric Cardiology
    • Congenital Heart Disease
    • Cardiac Surgery

    Background:

    • Left ventricular outflow tract obstruction (LVOTO) is a common concern in pediatric cardiology.
    • Congenitally corrected transposition of the great vessels (ccTGA) is often associated with LVOTO.
    • Accessory mitral valve tissue is an uncommon cause of LVOTO.

    Purpose of the Study:

    • To describe cases of LVOTO caused by accessory mitral valve tissue in children.
    • To highlight the diagnostic methods and surgical management of this rare condition.

    Main Methods:

    • Case series review of pediatric patients with LVOTO.
    • Diagnostic imaging included echocardiography and angiography.
    • Surgical intervention involved excision of accessory mitral valve tissue via arteriotomy.

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    Main Results:

    • Three pediatric cases of LVOTO due to accessory mitral valve tissue were identified.
    • Two patients had ccTGA, and one had normally connected great vessels.
    • All patients underwent successful surgical resection of the accessory tissue without complications.

    Conclusions:

    • Accessory mitral valve tissue is a rare but treatable cause of LVOTO in children.
    • Echocardiography and angiography are crucial for diagnosis.
    • Surgical excision is an effective treatment, preserving normal cardiac structures and conduction pathways.