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Related Experiment Videos

Circulating aggregated platelets in coronary artery disease.

J Fuchs, I Weinberger, Z Rotenberg

    The American Journal of Cardiology
    |September 1, 1987
    PubMed
    Summary

    Platelet aggregation is elevated in stable angina, unstable angina, and acute myocardial infarction (AMI) patients compared to healthy individuals. Early, reversible platelet activation may play a key role in unstable angina and AMI pathogenesis.

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    Circulation·1995

    Area of Science:

    • Cardiovascular Medicine
    • Hematology
    • Platelet Physiology

    Background:

    • Platelet aggregation is a critical factor in thrombotic cardiovascular diseases.
    • Understanding the dynamics of platelet aggregation in different ischemic heart conditions is essential for diagnosis and treatment.

    Purpose of the Study:

    • To quantify and differentiate circulating reversible and irreversible platelet aggregates in patients with stable angina, unstable angina, and acute myocardial infarction (AMI).
    • To investigate the role of platelet activation phases in the pathogenesis of these conditions.

    Main Methods:

    • Blood samples from 30 stable angina, 22 unstable angina, 50 AMI patients, 50 healthy, and 20 noncardiac controls were analyzed.
    • Platelet aggregates were quantified in two solutions: one with EDTA and formalin (reversible and irreversible) and one with EDTA alone (irreversible only).

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  • Reversible aggregates were calculated by subtracting irreversible from total aggregates.

    • Main Results:

    • Patients with stable angina showed significantly higher platelet aggregation (15 ± 4%) than controls (7 ± 2%).
    • Unstable angina and AMI groups exhibited similar, significantly higher platelet aggregation (24 ± 13% and 24 ± 10%, respectively) compared to stable angina.
    • In stable angina and AMI, a higher proportion of aggregates were reversible (89% and 83%) than irreversible (11% and 17%).

    Conclusions:

    • Elevated circulating platelet aggregates are present across stable angina, unstable angina, and AMI.
    • The findings suggest that early, reversible platelet activation is significantly involved in the pathogenesis of unstable angina and AMI.