[Determination of serum-digitalisglycoside concentrations by radioimmunoassay before, during and after operations with extracorporal circulation (author's transl)].

In 13 adult patients serum-glycoside concentrations, renal glycoside elimination and endogenic creatinine clearance were determined before, during and in the first 4 days following the operation. A postoperative digitalis cumulation has not been seen. But there was a diminished digitalis tolerance in the immediate postoperative phase. Two patients got ventricular bigeminus. The low potassium values at the same time may possibly affect the sensitivity of digitalis.