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Acute aortic dissection and medial degeneration in patients with 'floppy' mitral valves

R McKay, M H Yacoub

    Thorax
    |February 1, 1976
    PubMed

    Insights

    Mitral regurgitation linked to floppy valves can cause aortic necrosis. Careful aortic clamping during valve replacement can prevent intimal tears and dissections, improving patient outcomes.

    Area of Science:

    • Cardiovascular Surgery
    • Cardiac Valve Disease
    • Aortic Pathology

    Background:

    • Mitral regurgitation (MR) is often associated with 'floppy' valves.
    • These cases frequently present with areas of medical necrosis in the ascending aorta.
    • Aortic clamping during valve replacement poses a risk in patients with aortic necrosis.

    Observation:

    • Application of an aortic clamp to a necrotic area can lead to intimal tears.
    • Intimal tears can result in acute aortic dissection.
    • This complication was observed in three patients undergoing mitral valve replacement.

    Findings:

    • Two of the three patients experienced acute dissection during the operation.
    • Successful surgical repair of the intimal tear was achieved in these two cases.
    • One patient developed dissection that was not recognized intraoperatively.

    Implications:

    • Minimizing aortic clamping duration may reduce the risk of intimal trauma.
    • Maintaining meticulous control over perfusion pressure is crucial.
    • These strategies may decrease the incidence of intimal trauma and acute aortic dissection in patients with floppy mitral valves and associated aortic necrosis.

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