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Accessory flaplike tissue causing ventricular outflow obstruction

A S Gomes, P H Nath, A Singh

    The Journal of Thoracic and Cardiovascular Surgery
    |August 1, 1980
    PubMed
    Summary
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    Accessory endocardial tissue can cause ventricular outflow obstruction in children and young adults. Surgical resection of this tissue is a viable treatment, with successful outcomes in most cases.

    Area of Science:

    • Cardiovascular Surgery
    • Pediatric Cardiology
    • Congenital Heart Disease

    Background:

    • Ventricular outflow obstruction can arise from various congenital anomalies.
    • Accessory endocardial tissue is a rare cause of such obstruction, particularly in pediatric and young adult populations.

    Observation:

    • Three cases are presented: two children and one young adult with ventricular outflow obstruction.
    • Angiocardiography revealed a characteristic radiolucent, crescent-shaped or linear filling defect at the obstruction site.
    • Associated cardiac conditions included ventricular septal defect, atrial septal defect, cleft mitral valve, and complete transposition.

    Findings:

    • The obstruction was caused by a valvelike flap of accessory endocardial tissue.
    • Surgical resection of the accessory tissue was performed concurrently with correction of associated defects.

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  • Successful outcomes were achieved in two of the three patients following surgical intervention.

    • Implications:

    • Early diagnosis and surgical management of accessory endocardial tissue causing outflow obstruction can lead to favorable outcomes.
    • This condition requires careful consideration in the differential diagnosis of pediatric and young adult outflow tract obstructions.
    • Further research into the embryology and surgical techniques for this rare anomaly is warranted.