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Related Experiment Videos

Does increased platelet release normalize during anti-hypertensive treatment?

K Lande1, S E Kjeldsen, I Eide

  • 1Department of Internal Medicine, Oslo University Medical School, Ullevaal Hospital, Norway.

Thrombosis and Haemostasis
|October 28, 1987
PubMed
Summary

This study on mild hypertension found that elevated platelet function normalized during placebo treatment, suggesting patient adaptation to blood sampling, not drug effects. Beta-blockers did not alter beta-thromboglobulin levels.

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Area of Science:

  • Cardiovascular Medicine
  • Hematology
  • Pharmacology

Background:

  • Mild hypertension is associated with altered blood platelet function.
  • Beta-thromboglobulin (BTG) is a marker of platelet activation.
  • Previous studies suggested anti-hypertensive drugs normalize platelet function.

Purpose of the Study:

  • To investigate the effect of propranolol on platelet function in men with mild hypertension.
  • To determine if observed normalization of platelet function during anti-hypertensive therapy is drug-dependent or due to other factors.

Main Methods:

  • A placebo-controlled, crossover study design was employed.
  • Ten male patients with untreated mild hypertension were included.
  • Blood platelet function was assessed by measuring plasma beta-thromboglobulin (BTG) levels and platelet size over four periods: baseline, placebo, propranolol, and placebo.

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Main Results:

  • Plasma BTG levels normalized during the initial placebo period.
  • BTG levels remained unchanged during propranolol treatment and the subsequent placebo period.
  • Systolic blood pressure and heart rate decreased with propranolol.
  • Platelet size significantly increased during beta-blocker treatment.

Conclusions:

  • The normalization of elevated platelet function observed in previous studies may be attributed to patient adaptation to the blood sampling procedure.
  • Propranolol did not significantly alter BTG levels in patients with mild hypertension.
  • Platelet size changes during beta-blocker therapy warrant further investigation.