[Myoglobin behavior with hexoprenaline and beta blockade]

The addition of the calcium-antagonist Verapamil in order to antagonize myocardial side-effects under tokolysis with beta-mimetic agents was more and more critisized in the last time. We have therefore combined the tocolytic agent Hexoprenalin with the beta 1-blocking agent Metroprolol in 24 patients and have analysed the myoglobin level before as well as two and four hours after the beginning of tokolysis. There was no increase of serum-myoglobin seen under this tocolytic regime.