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[Right ventricular outflow tract reconstruction with monocusp patch]

T Ikeda1, Y Yokota, F Okamoto

  • 1Department of Surgery, Heart Institute, Amagasaki Hospital, Hyogo, Japan.

Rinsho Kyobu Geka = Japanese Annals of Thoracic Surgery
|February 1, 1990
PubMed
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Two monocusp patches for congenital heart defect repair equally relieved outflow obstruction. However, the separate transannular outflow patch (STOP) demonstrated superior effectiveness in preventing postoperative pulmonary regurgitation compared to the monocusp valve outflow patch (MVOP).

Area of Science:

  • Cardiac Surgery
  • Congenital Heart Defects
  • Medical Device Technology

Background:

  • Reconstruction of the right ventricular outflow tract is critical for managing various congenital heart defects.
  • Monocusp patches are utilized to address outflow tract abnormalities, but their comparative efficacy requires further investigation.

Purpose of the Study:

  • To compare the effectiveness of two distinct monocusp patch types in right ventricular outflow tract reconstruction.
  • To evaluate the incidence of pulmonary regurgitation following the use of bovine pericardial monocusp valve outflow patch (MVOP) versus separate transannular outflow patch (STOP) with equine pericardial monocusp.

Main Methods:

  • A comparative study involving 11 patients receiving MVOP and 10 patients receiving STOP for right ventricular outflow tract reconstruction.

Related Experiment Videos

  • Assessment of early and late postoperative outcomes, including pressure gradients and pulmonary regurgitation, over a mean follow-up of 19 months.

    • Main Results:

    • Both MVOP and STOP effectively relieved right ventricular outflow obstruction, with no significant difference in early postoperative pressure gradients.
    • A statistically significant difference in pulmonary regurgitation was observed, with STOP demonstrating a lower incidence and severity compared to MVOP (p < 0.005).
    • One operative death occurred in the MVOP group; no late deaths were reported in either group.

    Conclusions:

    • Both monocusp patch types provide comparable relief of right ventricular outflow obstruction in congenital heart defect patients.
    • The separate transannular outflow patch (STOP) is more effective than the monocusp valve outflow patch (MVOP) in preventing postoperative pulmonary regurgitation.