Impact of red blood cell transfusion on platelet aggregation and inflammatory response in anemic coronary and noncoronary patients: the TRANSFUSION-2 study (impact of transfusion of red blood cell on platelet activation and aggregation studied with flow cytometry use and light transmission aggregometry)

Journal of the American College of Cardiology
Johanne SilvainGilles Montalescot

Abstract

This study sought to determine whether red blood cell (RBC) transfusion increases in vivo platelet aggregation and inflammation in coronary and noncoronary patients. RBC transfusion increases in vitro platelet activation and aggregation in healthy volunteers, providing a possible explanation for the increase in recurrent ischemic events and mortality reported after RBC transfusion in patients with acute coronary syndromes (ACS). Platelet reactivity was measured before and after RBC transfusion in 61 patients (33 with ACS patients and 28 without ACS). Relative changes between baseline and post-transfusion measurements of maximal and residual platelet aggregation were considered with different agonists as well as changes in vasodilator-stimulated phosphoprotein platelet reactivity index and P-selectin expression. Inflammatory and thrombotic biomarkers were also measured before and after transfusion. After RBC transfusion, platelet reactivity was increased when measured using adenosine diphosphate-induced light transmission aggregometry (11.6% relative increase in maximal platelet aggregation, p = 0.004; 10.8% increase in residual platelet aggregation, p = 0.005) and vasodilator-stimulated phosphoprotein platelet reactivity index ...Continue Reading

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