title: [Analysis of the structure of cardiac rhythm during treatment of auricular fibrillation with digitalis].
abstract: The structure of cardiac rhythm was studied with the help of specialized computers during digitalization in 60 patients with atrial fibrillation of different etiology. The reduction of the heart contractions rate under digitalization is accompanied by certain changes in the structure of cardiac rhythm: the arrhythmic pattern of the ventricular contractions increases with a predominant growth of the number of long R--R intervals, the transitions from short intervals to longer ones become sharper, and portions of a relatively stable ventricular rhythm appear. Three main types of dynamics of the rhythm structure were distinguished on the basis of the changes in the interval R--R histogram. The described changes in the structure of cardiac rhythm are not specific, but when Digitalis drugs are used alone they can be used as additional criteria for digitalization.
mesh_terms: D000328:Adult; D000368:Aged; D001281:Atrial Fibrillation / Q000188:drug therapy / Q000209:etiology / Q000503:physiopathology*; D001283:Atrioventricular Node / Q000503:physiopathology*; D003327:Coronary Disease / Q000150:complications; D004077:Digoxin / Q000627:therapeutic use*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D006980:Hyperthyroidism / Q000150:complications; D008875:Middle Aged; D012214:Rheumatic Heart Disease / Q000150:complications
chemical_list: D004077:Digoxin
vernacular_title: Analiz struktury serdechnogo ritma pri digitalisnoĭ terapii mertsatel'noĭ aritmii.