[Myoglobin increase during tocolysis (author's transl)].

The serum myoglobin level was performed before as well as two and four hours following the beginning of intravenous tocolysis in 22 pregnant patients who were treated with the betasympathicomimetic agent, hexoprenalin because of premature labour. In six of the patients a rise of 26--140% in myoglobin was observed in comparison with the basal level. One of the patients even produced a twenty-fold rise. The value of serum myoglobin determination in the diagnosis of myocardial necroses is discussed with respect to the literature and the presented material.