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Subaortic membrane excision: mid-term results.

S Talwar1, A K Bisoi, R Sharma

  • 1Cardiothoracic Centre, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India.

Heart, Lung & Circulation
|December 15, 2005
PubMed
Summary
This summary is machine-generated.

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Surgical resection of subaortic membrane (SAM) offers long-term benefits for patients with this fixed subaortic obstruction. Combining SAM resection with septal myectomy shows a low recurrence rate and improves heart function.

Area of Science:

  • Cardiology
  • Cardiac Surgery
  • Pediatric Cardiology

Background:

  • Subaortic membrane (SAM) is a congenital heart defect causing fixed subaortic obstruction.
  • It involves a fibrous membrane below the aortic valve, impeding blood flow from the left ventricle.

Purpose of the Study:

  • To evaluate the effectiveness and long-term outcomes of surgical treatment for discrete subaortic membrane.
  • To assess the role of concomitant septal myectomy in preventing recurrence.

Main Methods:

  • Retrospective analysis of 45 patients (aged 2-23 years) who underwent transaortic SAM resection with septal myectomy.
  • Preoperative assessment included echocardiography to measure left ventricular outflow tract gradients and evaluate aortic regurgitation (AR) and ejection fraction (LVEF).

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Main Results:

  • No early or late deaths occurred post-surgery.
  • Follow-up showed significant improvement in LVEF (mean 58%) and reduction in AR.
  • Only four patients had residual gradients >30 mmHg, indicating successful obstruction relief.

Conclusions:

  • Surgical resection of SAM provides durable, long-term benefits.
  • Routine septal myectomy is associated with a low risk of SAM recurrence, improving patient outcomes.