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Abstract
Objective. Ischemia-modified albumin (IMA) has emerged as a new biomarker of myocardial ischemia. Currently, no information is available on maternal IMA levels during normal and complicated pregnancy. Preeclampsia is associated with ischemia and increased formation of free radicals in the placenta. We therefore hypothesized that production of IMA may occur in women with preeclampsia. Methods. Serum IMA and albumin concentrations were assessed in 12 patients with preeclampsia, 12 normal pregnant controls, and 12 nonpregnant controls. IMA levels were compared between groups and corrected for albumin by multivariate regression analysis. Results. Mean IMA levels were elevated in normal pregnant controls (107.3 U/mL; 95% CI, 102.5 to 112.01), compared with nonpregnant controls (94.5 U/mL; CI, 89.4 to 99.6; p = 0.015). In patients with preeclampsia, IMA levels were similar to those in normal pregnant controls (109.7 U/mL; CI, 102.2 to 117.2; p = 0.65). Also, no difference in IMA levels was observed between women with preeclampsia who delivered small-for-gestational-age (SGA) infants (99.0 U/mL; CI, 87.9 to 110.1; p = 0.13) and women with preeclampsia but without SGA. Conclusion. Serum IMA, which has been advocated as a clinical marker of cardiac ischemia, appears to be elevated during normal pregnancy. We found no significant relationship between IMA levels and preeclampsia, in women with or without SGA infants.