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Aortic root dilation after the Ross procedure.

M V Tantengco1, R A Humes, S K Clapp

  • 1Department of Pediatrics, Wayne State University School of Medicine, Children's Hospital of Michigan, Detroit 48201, USA.

The American Journal of Cardiology
|April 6, 1999
PubMed
Summary
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The Ross procedure causes initial neoaortic root stretching, followed by dilation up to one year. Aortic root size stabilizes thereafter, with no further progression observed beyond 12 months post-surgery.

Area of Science:

  • Cardiovascular Surgery
  • Pediatric Cardiology
  • Cardiac Imaging

Background:

  • The Ross procedure is a complex cardiac surgery involving aortic valve replacement with a patient's own pulmonary valve.
  • Understanding neoaortic root geometry changes post-Ross procedure is crucial for long-term patient management.
  • Serial echocardiography is essential for monitoring cardiac structure and function after congenital heart defect repairs.

Purpose of the Study:

  • To evaluate serial changes in neoaortic root geometry after the Ross procedure.
  • To compare postoperative neoaortic root dimensions with preoperative and healthy control values.
  • To determine the time course and progression of aortic root dilation following the Ross procedure.

Main Methods:

  • Retrospective analysis of echocardiographic data from 30 patients undergoing the Ross procedure.

Related Experiment Videos

  • Measurement of neoaortic root dimensions (annulus and sinuses of Valsalva) indexed to body surface area.
  • Comparison of postoperative measurements with preoperative, immediate postoperative, and healthy control Z scores.

    • Main Results:

    • An immediate "stretch" of the neoaortic root was observed 1 week post-surgery.
    • Significant additional aortic annular dilation occurred between 2-12 months and 16-33 months post-surgery (p <0.01).
    • Progressive enlargement of the aortic sinus was noted from hospital discharge to 2-12 months and 16-33 months (p <0.01).
    • No further root size progression was observed between 2-12 and 16-33 months post-surgery.
    • A decrease in left ventricular size was observed, with stable blood pressure and aortic valve regurgitation.

    Conclusions:

    • Neoaortic root dilation, including annulus and sinuses, progresses up to one year after the Ross procedure.
    • Aortic root dimensions appear to stabilize beyond the first year, with no significant further dilation observed.
    • These findings highlight the importance of long-term echocardiographic surveillance for patients who have undergone the Ross procedure.