[Routine serum digoxin determination on hospital admission (author's transl)].

The purpose of the present study was the collection of data concerning digitalis treatment of patients outside hospital. The investigation was carried out on 200 patients over 60 years of age, consecutively admitted to a 750-bed general hospital (35% ot a medical ward, 65% to other specialities). An ECG and serum creatinine and digoxin determinations were performed on the day of admission and a careful history taken of the drugs administered before admission. 30 patients reported the use of digoxin or other digitalis drugs, whilst another 48 patients reported taking cardiac drugs in general. The prevalence of digoxin levels exceeding 2 ng/ml was 11.5% in the group of patients known to have taken digitalis preparations, 18% among the 92 patients with positive serum digoxin levels and highest (30%) in the subgroup admitted due to cardiac failure. In patients with digoxin levels above 2 ng/ml the prevalence of elevated serum creatinine values (greater than 1.2 mg%) was markedly increased. Among patients with normal serum creatinine levels the mean age of patients with digoxin levels above 2 ng/ml was significantly higher than of those with digoxin levels below 2 ng/ml. A clear correlation between digoxin levels and ECG changes was not demonstrable; simultaneous administration of diuretics promotes the appearance of electrocardiographic signs of digitalis toxicity.