Serum selenium levels in distinct manifestations of coronary artery disease.

The trace element selenium plays an important role in the oxidation of lipids and is therefore closely associated with atherosclerosis. In a series of 49 unselected male patients having undergone coronary angiography, the serum selenium level was determined using flameless atomic absorption spectrometry (Zeeman technique), and compared to a standard (Seronorm; Nycomed). In the whole series the serum selenium levels were markedly decreased with no significant difference between patients with or without coronary artery disease. The severity of the coronary artery disease (CAD) did not correlate with the selenium level. However, patients with prior myocardial infarction had a significant higher selenium level than those without. Thus, the level of selenium does not appear to be a marker or a risk factor for coronary artery disease.