Concentrations of serum endogenous digitalis-llke factor(EDF)were determined by radioimmunoassay in 20 aged patients with coronary heart disease and 15 normal cases.

• 本文用放射免疫方法测定20例老年冠心病患者和15例正常老年人血清内源性洋地黄样因子(EDF)浓度。