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Related Experiment Videos

Discrete subaortic stenosis: a study of 20 cases

K G Gupta1, Y S Loya, S Sharma

  • 1Department of Cardiology, BYL Nair Hospital, Bombay.

Indian Heart Journal
|July 1, 1994
PubMed
Summary

Discrete subaortic stenosis in 20 patients was evaluated. Balloon dilatation proved safe and effective for membranous obstruction, while surgical resection is recommended for other types.

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Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Interventional Cardiology

Background:

  • Discrete subaortic stenosis (DSS) is a congenital heart defect causing left ventricular outflow tract obstruction.
  • Membranous obstruction is the most common form of DSS, often presenting with significant pressure gradients.

Purpose of the Study:

  • To evaluate the efficacy of different treatment modalities for discrete subaortic stenosis.
  • To assess the long-term outcomes of balloon dilatation for membranous subaortic stenosis.

Main Methods:

  • Retrospective review of 20 patients with discrete subaortic stenosis over 11 years.
  • Diagnostic imaging included cross-sectional echocardiography and angiography.
  • Intervention assessment involved balloon dilatation for membranous obstruction.

Main Results:

  • Membranous obstruction was identified in 85% of patients.
  • Balloon dilatation in 8 patients with membranous obstruction significantly reduced peak systolic gradients (107.1 to 32.3 mm Hg).
  • Hemodynamic benefits of balloon dilatation were sustained for a mean of 9.6 months.

Conclusions:

  • Balloon dilatation is a safe and effective treatment for thin subaortic membranes.
  • Surgical resection remains necessary for fibromuscular collar or tunnel-type subaortic obstructions.

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