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Pathological changes in spontaneous rupture of chordae tendineae

P J Gallagher, P K Caves, E B Stinson

    Annales Chirurgiae Et Gynaecologiae
    |January 1, 1977
    PubMed

    Insights

    Spontaneous mitral chordae tendineae rupture may stem from papillary muscle fibrosis, leading to dysfunction and chordal stretching. Mucoid degeneration of mitral valves appears linked to prolonged valvular issues.

    Area of Science:

    • Cardiology
    • Pathology
    • Cardiac Surgery

    Background:

    • Spontaneous rupture of mitral chordae tendineae is a rare but serious cardiac event.
    • The underlying pathophysiology and predisposing factors are not fully understood.

    Purpose of the Study:

    • To investigate the potential causes and associated pathological findings in patients with spontaneous mitral chordae tendineae rupture.
    • To explore the relationship between papillary muscle fibrosis, mitral valve degeneration, and chordal rupture.

    Main Methods:

    • Retrospective case series analysis of eight patients diagnosed with spontaneous mitral chordae tendineae rupture.
    • Histopathological examination of cardiac tissue, focusing on the papillary muscles and mitral valve leaflets.

    Main Results:

    • No predisposing cause was identified in any of the eight patients.
    • Pathological fibrosis of the papillary muscle was observed in seven patients, adjacent to the ruptured chordae.
    • Five patients exhibited mucoid degeneration of their mitral valves, correlating with a history of prolonged valvular dysfunction.

    Conclusions:

    • Papillary muscle dysfunction secondary to fibrosis is postulated as a mechanism leading to chordal stretching and subsequent rupture.
    • Mucoid degeneration of mitral valves may be a consequence of long-standing valvular dysfunction.

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