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Mitral valve anomalies obstructing left ventricular outflow

I L Hartyánszky1, K Kádár, S Bojeldein

  • 1Paediatric Cardiac Surgery Department, Hungarian Institute of Cardiology, Budapest, Hungary. harist@korb.1.sote.hu

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|October 23, 1997
PubMed
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This study details two rare cases of subaortic stenosis in pediatric patients. Successful surgical interventions involved removing accessory mitral valve tissue and repairing associated defects.

Area of Science:

  • Cardiology
  • Pediatric Surgery
  • Congenital Heart Disease

Background:

  • Subaortic stenosis is a significant cause of left ventricular outflow tract obstruction in children.
  • Uncommon etiologies, such as accessory mitral valve tissue, require specific diagnostic and surgical approaches.
  • Early diagnosis and intervention are crucial for managing congenital heart defects.

Observation:

  • Case 1: A 2-year-old boy presented with accessory mitral valve leaflet (AMVL) causing subaortic stenosis, associated with a discrete subaortic membrane.
  • Case 2: A 19-day-old newborn had accessory mitral valve tissue (AMVT) leading to subaortic stenosis, ventricular septal defect (VSD), and patent ductus arteriosus.

Findings:

  • Successful surgical relief in Case 1 involved AMVL removal and membrane resection.

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  • Successful surgical management in Case 2 included accessory tissue excision via VSD, VSD closure, and ductus ligation.

    • Implications:

    • These cases highlight the importance of recognizing and surgically addressing rare forms of subaortic stenosis.
    • Effective surgical strategies can lead to favorable outcomes in neonates and children with complex congenital heart anomalies.
    • Further research into the embryology and surgical techniques for accessory mitral valve tissue is warranted.