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  • Title: Rheological abnormalities and thromboembolic complications in heart disease: spontaneous echo contrast and red cell aggregation.
    Author: Kwaan HC, Sakurai S, Wang J.
    Journal: Semin Thromb Hemost; 2003 Oct; 29(5):529-34. PubMed ID: 14631552.
    Abstract:
    The role of abnormal rheological changes in the pathogenesis of thromboembolism has received much attention in recent years, especially in the field of cardiology. Such changes are sometimes seen in an echocardiogram as a smokelike haze known as spontaneous echo contrast (SEC). The presence and severity of SEC correlate with dilated cardiac chambers and the incidence of thromboembolic complications. It is caused by increased red cell aggregation and increased fibrinogen levels, both of which are known risk factors for thrombosis. Although not used clinically, measurements of red cell aggregation can be made in research settings. This can provide findings that give insight into factors causing increased red cell aggregation. A small series of patients with angina pectoris was studied with the Myrenne aggregometer for red cell aggregation. The results, which show correlation between the plasma fibrinogen and triglyceride levels, are presented. As yet, there are only a few therapeutic guidelines for the correction of abnormally high fibrinogen levels in patients at risk.
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