[A method of evaluating the effects of drugs on extrasystoles--single oral treatment (author's transl)].
D000284:Administration, Oral; D005117:Cardiac Complexes, Premature / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D004334:Drug Administration Schedule; D004341:Drug Evaluation / Q000379:methods; D006801:Humans; D010919:Placebos; D011217:Practolol / Q000008:administration & dosage*; D011433:Propranolol / Q000008:administration & dosage*
D010919:Placebos; D011433:Propranolol; D011217:Practolol