Back to Pegasus definition listing Choose a year from the dropdown to view that year's definition 2011 2011 2009 Structural heart surgery Date: May 2011 Definition: The undergoing of surgery requiring median sternotomy (surgery to divide the breastbone) on the advice of a Consultant Cardiologist, to correct any structural abnormality of the heart.No change since July 2009 Definition update history: Structural heart surgery May 2011 Structural heart surgery July 2009 What does this mean? The surgical division of the breastbone and the opening up of the chest wall, for the purpose of correcting a structural abnormality of the heart, for example, the surgical correction of a ventricular septal defect. Share this by email Back to Pegasus definition listing