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Rapid evolution from "normal" left ventricular outflow tract to fatal subaortic stenosis in infancy.
  1. R M Freedom,
  2. R S Fowler,
  3. W J Duncan


    Serial clinical, echocardiographic, haemodynamic, and angiocardiographic data support the conclusion that over four months severe discrete subaortic stenosis evolved from a previously angiocardiographically normal left ventricular outflow tract in an infant who had a successful repair of thoracic aortic coarctation. This case supports those who suggest that a myocardial factor may play an important role in the change in form and function of some congenitally malformed hearts.

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