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Related Experiment Videos

Aortic homograft obstruction.

D S Moodie, D D Mair, R E Fulton

    The Journal of Thoracic and Cardiovascular Surgery
    |October 1, 1976
    PubMed
    Summary
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    Calcified aortic homografts used for right ventricle-to-pulmonary artery reconstruction can obstruct blood flow and cause serious arrhythmias. Replacing these grafts with Hancock prostheses effectively reduced right ventricular pressure and improved patient outcomes.

    Area of Science:

    • Cardiovascular Surgery
    • Thoracic Surgery
    • Medical Devices

    Background:

    • Aortic homografts were utilized for right ventricle-to-pulmonary artery (RV-PA) continuity in 128 patients between 1967 and 1972.
    • A subset of these patients developed calcified, obstructed aortic homografts, necessitating further investigation.
    • These obstructions were associated with significant sequelae, including arrhythmias and elevated right ventricular pressures.

    Purpose of the Study:

    • To evaluate the long-term outcomes of patients with calcified, obstructed aortic homografts used for RV-PA continuity.
    • To assess the efficacy of replacing obstructed homografts with Hancock prostheses.
    • To analyze the impact of graft replacement on right ventricular pressure and patient morbidity.

    Main Methods:

    Related Experiment Videos

  • Retrospective review of 18 patients who underwent RV-PA reconstruction with aortic homografts and subsequently developed graft calcification and obstruction.
  • Clinical data analysis, including assessment of arrhythmias, right ventricular pressures, and postoperative complications.
  • Comparison of pre- and post-operative hemodynamic parameters following replacement with Hancock prostheses.

    • Main Results:

    • Seven patients experienced significant dysrhythmias, with two being life-threatening.
    • Seventeen patients presented with pre-replacement right ventricular pressures that were systemic or suprasystemic.
    • Following replacement with Hancock prostheses, 12 patients showed a reduction in right ventricular pressure to half of systemic pressure or less.

    Conclusions:

    • Obstructed aortic homografts pose a significant risk for patients requiring RV-PA continuity.
    • Hancock prosthesis replacement is a safe and effective option for managing calcified, obstructed aortic homografts.
    • Graft replacement with Hancock prostheses leads to substantial improvement in right ventricular hemodynamics and reduces associated complications.