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Elevated platelet reactivity in stable angina pectoris without significant coronary flow obstruction

P Järemo1, M Milovanovic, Tl Lindahl

  • 1Department of Internal Medicine, the Vrinnevi Hospital, Norrköping, Sweden. jaremo@beta.telenordia.se

Journal of Cardiovascular Medicine (Hagerstown, Md.)
|January 15, 2008
PubMed

Insights

Patients with angina pectoris and no major coronary artery blockages show increased platelet activity. This suggests a link between heightened platelet reactivity and this type of angina.

Area of Science:

  • Cardiology
  • Vascular Biology
  • Platelet Physiology

Background:

  • Angina pectoris can arise from causes other than major coronary artery obstructions, such as Prinzmetal angina and small vessel disease.
  • Understanding these alternative causes is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To investigate platelet activity in patients experiencing stable angina pectoris without significant obstructions in major coronary arteries.
  • To compare platelet reactivity between patients with and without significant coronary artery disease.

Main Methods:

  • Elective coronary angiography was performed on individuals with stable angina pectoris.
  • Patients with diabetes mellitus were excluded to ensure study homogeneity.
  • Platelet activity was measured in vitro using thrombin-receptor activating peptide (TRAP-6) and adenosine diphosphate (ADP) stimulation.

Main Results:

  • Patients with angina pectoris and no significant major coronary artery obstructions exhibited enhanced platelet reactivity.
  • This heightened reactivity was observed when platelets were stimulated with both TRAP-6 and ADP.
  • Statistical significance was noted for both TRAP-6 and ADP stimulation concentrations.

Conclusions:

  • Angina pectoris occurring without significant impediments in major epicardial arteries is associated with increased platelet reactivity.
  • Augmented platelet reactivity may play a role in the pathophysiology of angina pectoris in the absence of obstructive coronary artery disease.
Abstract

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