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Increased in vitro platelet aggregation in hypertriglyceridemias.

H Riess, W Merk, C Falkner

    Thrombosis Research
    |February 1, 1986
    PubMed
    Summary
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    Platelet aggregation is heightened in patients with high triglyceride levels (hypertriglyceridemia). The impedance method effectively measures platelet function in these individuals, revealing lower threshold concentrations for aggregation.

    Area of Science:

    • Cardiovascular Medicine
    • Hematology
    • Clinical Chemistry

    Background:

    • Hypertriglyceridemia is associated with an increased risk of cardiovascular disease.
    • Platelet activation and aggregation play a crucial role in atherothrombosis.
    • Understanding platelet function in hypertriglyceridemia is essential for risk assessment.

    Purpose of the Study:

    • To investigate platelet aggregation in patients with different types of hyperlipoproteinemia (HLP).
    • To compare platelet aggregation measurements using turbidometric and impedance techniques.
    • To evaluate the efficacy of the impedance method in hypertriglyceridemic samples.

    Main Methods:

    • Platelet aggregation was monitored in 25 hypertriglyceridemic patients (HLP types IIb, IV, V) and 10 controls.

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  • Adenosine diphosphate (ADP) and collagen were used as agonists.
  • Platelet aggregation was assessed in platelet-rich plasma (PRP) and whole blood (WB) using turbidometric and impedance methods.

    • Main Results:

    • Turbidometric method was limited by plasma optical density in hypertriglyceridemia.
    • Impedance method allowed reliable registration of platelet aggregation in PRP and WB.
    • Significantly lower threshold aggregatory concentrations were observed in all HLP groups for both agonists.

    Conclusions:

    • Hypertriglyceridemia is associated with enhanced platelet aggregability.
    • The impedance method is a robust technique for assessing platelet function in hypertriglyceridemia.
    • These findings suggest a prothrombotic state in hypertriglyceridemia, contributing to cardiovascular risk.