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Related Experiment Videos

Circulating immunoreactive endothelin in ischemic heart disease.

M Yasuda1, M Kohno, A Tahara

  • 1First Department of Internal Medicine, Osaka City University Medical School, Japan.

American Heart Journal
|April 1, 1990
PubMed
Summary

Plasma endothelin levels significantly increase during acute myocardial infarction (AMI), correlating with cardiac dysfunction and coagulation activation. Levels remained normal in stable angina pectoris patients.

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Area of Science:

  • Cardiology
  • Vascular Biology
  • Biochemistry

Background:

  • Endothelin (ET) is a potent vasoconstrictor peptide.
  • Its role in acute myocardial infarction (AMI) is not fully understood.
  • Measuring circulating immunoreactive endothelin (ir-ET) can provide insights into AMI pathophysiology.

Purpose of the Study:

  • To investigate circulating immunoreactive endothelin (ir-ET) levels in patients with AMI.
  • To compare ir-ET levels in AMI patients with those in stable angina pectoris (SAP) and healthy controls.
  • To explore correlations between ir-ET levels and clinical parameters in AMI.

Main Methods:

  • Plasma ir-ET levels were measured using radioimmunoassay.
  • Study included 9 AMI patients, 10 SAP patients, and 25 healthy controls.

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  • Correlations were assessed with wall motion abnormality index, thrombin-antithrombin III complex, beta-thromboglobulin, and Killip classification.

    • Main Results:

    • Plasma ir-ET levels were significantly elevated in the acute phase of AMI (3.8 +/- 1.7 pg/ml) compared to controls (0.5 +/- 0.2 pg/ml).
    • Elevated ir-ET positively correlated with wall motion abnormality index (r=0.56), thrombin-antithrombin III complex (r=0.55), and beta-thromboglobulin (r=0.39).
    • Highest ir-ET levels were observed in AMI patients with Killip class IV; levels were not elevated in SAP patients (0.8 +/- 0.3 pg/ml).

    Conclusions:

    • Circulating ir-ET levels are increased during the acute phase of AMI.
    • Elevated ir-ET in AMI may be linked to cardiac dysfunction, coagulation system activation, and platelet hyperactivity.
    • Endothelin may play a significant pathophysiological role in acute myocardial infarction.