Evidence for increased levels of plasminogen activator inhibitor and tissue plasminogen activator in plasma of patients with angiographically verified coronary artery disease

European Heart Journal
B O OlofssonT Nilsson

Abstract

We studied 234 consecutive patients who underwent coronary angiography because of severe angina pectoris. Tissue plasminogen activator (tPA), plasminogen activator inhibitor (PAI), and lipoprotein Lp(a) were measured in citrated plasma samples. The 214 patients showing significant coronary artery stenosis (greater than 50% reduction of luminal area in any of the great coronary arteries) had higher mean levels of tPA (P less than 0.001) and PAI (P less than 0.01) than a random population sample of similar age. PAI and tPA levels were higher in smokers than in either non-smokers or ex-smokers, and in patients with hypertension tPA was increased. Subjects with blood group A had a higher mean Lp(a) level than subjects with blood group O. There were positive correlations of PAI and tPA levels with serum triglycerides and with body mass index; Lp(a) correlated weakly with plasma fibrinogen concentrations. The findings suggest an impairment of the fibrinolytic system in patients with coronary artery disease, which offers a link between established risk factors and a plausible pathophysiological mechanism, namely thrombus turnover.

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