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Alteration of plasma antithrombin III levels in ischemic heart disease

R H Yue, M M Gertler, T Starr

    Thrombosis and Haemostasis
    |June 30, 1976
    PubMed

    Insights

    Antithrombin III levels decrease with increasing ischemic heart disease risk, with acute myocardial infarction patients showing the lowest levels. This suggests a gradual disease process and a sudden failure in the body's clotting regulation.

    Area of Science:

    • Cardiology
    • Hematology
    • Biochemistry

    Background:

    • Antithrombin III (ATIII) is a key regulator of blood coagulation.
    • Understanding ATIII levels in relation to ischemic heart disease (IHD) and acute myocardial infarction (AMI) is crucial for risk assessment.
    • Coagulation markers can provide insights into the pathophysiology of cardiovascular events.

    Purpose of the Study:

    • To quantitatively determine plasma antithrombin III levels in middle-aged males.
    • To investigate the correlation between antithrombin III levels, ischemic heart disease risk, and acute myocardial infarction.
    • To explore the relationship between antithrombin III and kaolin-activated partial thromboplastin time (aPTTT) in these patient groups.

    Main Methods:

    • Quantitative determination of plasma antithrombin III levels.
    • Analysis of antithrombin III levels across different risk groups for ischemic heart disease (low risk, high risk, acute myocardial infarction).
    • Simultaneous measurement of kaolin-activated partial thromboplastin time (aPTTT).

    Main Results:

    • Mean antithrombin III levels were lowest in the low-risk IHD group, intermediate in the high-risk IHD group, and highest in the AMI group.
    • A significant decrease in mean kaolin-activated partial thromboplastin time was observed in the AMI group.
    • A strong positive correlation was found between antithrombin III and kaolin-activated partial thromboplastin time across the entire study population.

    Conclusions:

    • Declining antithrombin III levels correlate with increasing risk of ischemic heart disease.
    • The findings suggest that ischemic heart disease develops gradually, with a sudden failure of regulatory mechanisms (like ATIII) occurring during acute events such as myocardial infarction.
    • Antithrombin III and aPTTT measurements may aid in assessing the coagulation status of patients at risk for or experiencing cardiovascular events.

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