[Myocardial necrosis due to tocolysis with fenoterol (author's transl)]

95 women had undergone treatment with beta-adrenergic Fenoterol for periods lasting as long as 9 weeks in order to try to avoid premature labour. Electrocardiographic studies and regular controls of the kinase isoenzymes of creatin which is specific for cardiac muscle were carried out in order to avoid myocardial damage, as was MB creatinkinase. In no case was a pathological rise in the activity of the enzyme shown even after full doses of the substance had been given for a long time.