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A clinicopathological study on the papillary muscle dysfunction

M Sugiura, S Ohkawa, C Kamata

    Japanese Heart Journal
    |March 1, 1977
    PubMed
    Summary
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    Papillary muscle dysfunction (PMD) occurred in 1.8% of autopsies. Myocardial infarction (MI) was a key factor, with papillary muscle infarction (PMI) leading to PMD in some cases, especially in females with inferior MI.

    Area of Science:

    • Cardiology
    • Pathology
    • Medical Research

    Background:

    • Papillary muscle dysfunction (PMD) is a recognized cardiac condition.
    • Myocardial infarction (MI) can affect cardiac structures, including papillary muscles.
    • Understanding the etiology and presentation of PMD is crucial for patient management.

    Purpose of the Study:

    • To investigate the incidence and characteristics of papillary muscle dysfunction (PMD).
    • To determine the relationship between myocardial infarction (MI) and PMD.
    • To classify PMD based on clinical course and pathological findings.

    Main Methods:

    • Retrospective autopsy study of 600 cases.
    • Analysis of clinical data, auscultation, and phonocardiograms.
    • Pathological examination of cardiac tissues, including myocardial infarction (MI) and papillary muscle infarction (PMI).

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    Main Results:

    • PMD was identified in 1.8% of autopsies (11 cases).
    • Papillary muscle infarction (PMI) was present in 32% of MI cases (36/113).
    • PMD developed in 9 cases of PMI, with higher incidence in inferior MI and females.

    Conclusions:

    • PMD can result from myocardial infarction (MI), with papillary muscle infarction (PMI) being a significant precursor.
    • PMD presents with distinct clinical and pathological types.
    • Severe lesions in the ventricular wall, in addition to PMI, are necessary for PMD development.