title: Monitoring digoxin therapy: I. Plasma concentrations and an in vitro assay of tissue response.
abstract: 1 An in vitro technique is described for measuring the uptake of 86Rb by human erythrocytes. 2 Fifteen patients were treated with digoxin for atrial fibrillation and other fast arrhythmias. 3 86Rb uptake by the patients' own red cells fell from pre-treatment values during digitalization. 4 The therapeutic response of patients with atrial fibrillation correlated better with the changes in 86Rb uptake than with plasma digoxin concentrations.
mesh_terms: D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000097:blood / Q000188:drug therapy; D004077:Digoxin / Q000097:blood* / Q000494:pharmacology / Q000627:therapeutic use; D004912:Erythrocytes / Q000187:drug effects* / Q000378:metabolism; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D008875:Middle Aged; D011868:Radioisotopes; D012413:Rubidium / Q000097:blood; D013997:Time Factors
chemical_list: D011868:Radioisotopes; D004077:Digoxin; D012413:Rubidium