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[Scintigraphy in cardiomyopathy].

O Pachinger, E Ogris, H Sochor

    Acta Medica Austriaca
    |January 1, 1979
    PubMed
    Summary
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    Quantitative myocardial perfusion imaging using 201Tl helps differentiate cardiac conditions. This study evaluated right ventricle (RV) and left ventricle (LV) function in patients with cardiomyopathies, revealing reduced performance and altered Tl-uptake in congestive cardiomyopathy (COCM).

    Area of Science:

    • Cardiology
    • Nuclear Medicine
    • Cardiovascular Imaging

    Background:

    • Congestive cardiomyopathy (COCM) and hypertrophic cardiomyopathy (HOCM) significantly impact cardiac function.
    • Noninvasive assessment of right ventricle (RV) and left ventricle (LV) performance is crucial for diagnosis and management.
    • Quantitative myocardial perfusion imaging offers insights into cardiac health.

    Purpose of the Study:

    • To evaluate RV and LV function in patients with COCM and HOCM using quantitative 201Tl myocardial perfusion imaging.
    • To assess the utility of scintigraphic findings in differentiating cardiac etiologies and LV dysfunction.

    Main Methods:

    • Quantitative 201Tl myocardial perfusion imaging was performed on 32 COCM patients, 10 HOCM patients, and 21 normal subjects.
    • Analysis included RV and LV performance parameters, regional wall motion, and Tl-distribution and uptake.

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  • Scintigraphic aspects and gated blood pool scans were utilized for dynamic two-dimensional evaluation.

    • Main Results:

    • COCM patients exhibited significantly reduced RV and LV performance (p < 0.01) and impaired radial shortening.
    • Relative Tl-uptake was significantly reduced in COCM patients (p < 0.05), with RV free wall visualized in 80%.
    • COCM patients showed increased LV septal and free wall thickness, with disproportionate septal hypertrophy noted.

    Conclusions:

    • Quantitative 201Tl myocardial perfusion imaging can noninvasively differentiate disturbed LV function and classify myocardial etiology.
    • Scintigraphic findings, including reduced Tl-uptake and wall motion abnormalities, are indicative of cardiomyopathy.
    • Radionuclide techniques provide dynamic evaluation of interventricular septum and LV function in cardiac disease.