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Abstract
Lipoprotein(a) (Lp(a)) and the acute-phase proteins, orosomucoid, haptoglobin and α1-antitrypsin, were studied in 32 patients with acute myocardial infarction. Samples were taken at admission and, after fasting overnight, on the following 6 days. In a subgroup of 21 patients total serum cholesterol, high-density lipoprotein (HDL) cholesterol and triglycerides were also estimated. In a linear regression model a significant relation between the relative values of Lp(a) and the time in days was obtained (p = 0.001). Compared with the acute-phase proteins, however, Lp(a) showed a weak increase and the individual responses were very variable. There were no correlations between the individual changes in Lp(a) and the changes in the actue-phase proteins, but Lp(a) changes correlated significantly with the changes in total cholesterol and low-density lipoprotein (LDL) cholesterol. It is suggested that the Lp(a) reaction in myocardial infarction is linked to the reaction of the lipoproteins. There may also be several clinical conditions, including different medications, which influence the Lp(a) level.