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Effect of aortic valve stenosis on haemostasis is independent from vascular atherosclerotic burden

Pawel Petkow Dimitrow1, Marta Hlawaty, Anetta Undas

  • 1Institute of Cardiology, Collegium Medicum Jagiellonian University, ul. Kopernika 17, 31-501 Krakow, Poland. dimitrow@mp.pl

Atherosclerosis
|January 28, 2009
PubMed

Insights

Aortic stenosis (AS) enhances blood coagulation and platelet activation, indicating a prothrombotic state. This activation is linked to turbulent blood flow, not just valve narrowing.

Area of Science:

  • Cardiovascular Medicine
  • Hematology
  • Thrombosis Research

Background:

  • Aortic stenosis (AS) is a significant cardiovascular condition.
  • The potential prothrombotic state associated with AS requires further investigation.
  • Understanding the interplay between AS severity and hemostatic activation is crucial.

Purpose of the Study:

  • To investigate whether blood coagulation and platelet activation are elevated in patients with aortic stenosis.
  • To identify factors that may influence these hemostatic processes in AS.

Main Methods:

  • Seventy-five patients with AS and 75 matched controls were analyzed.
  • Markers of thrombin generation (thrombin-antithrombin complex, prothrombin fragment 1+2) and platelet activation (soluble CD40 ligand, beta-thromboglobulin, P-selectin) were measured.
  • Atherosclerosis in carotid and coronary arteries was assessed as a potential confounder.

Main Results:

  • Patients with AS exhibited approximately double the concentrations of thrombin and platelet activation markers compared to controls.
  • Maximal aortic stenosis gradient strongly correlated with markers of thrombin generation and platelet activation.
  • Aortic valve area showed a weaker negative association with only one platelet marker (beta-thromboglobulin).
  • Concomitant atherosclerosis did not significantly impact thrombin generation or platelet activation in AS patients.

Conclusions:

  • Aortic stenosis predisposes individuals to a prothrombotic state.
  • Increased maximal gradient, reflecting turbulent flow, is associated with heightened coagulation and platelet activation.
  • The severity of aortic valve narrowing itself was not strongly correlated with these prothrombotic markers.
Abstract

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