title: [Spectral parameters of heart rate variability and frequency of detection of autoantibodies to beta(1)-adrenoreceptors in patients with tachyarrhythmias: idiopathic and at the background of primary myocardial diseases].
abstract: In order to assess parameters of heart rate variability (HRV) and prevalence of autoantibodies against the beta(1)-adrenoreceptors in patients with cardiac arrhythmias we studied 42 patients with arrhythmias and 20 healthy control subjects. Thirty one patients with idiopathic arrhythmias were included in group I: with paroxysmal atrial fibrillation or flutter (n=13), paroxysmal atrial tachycardia (n=2) and paroxysmal ventricular tachycardia (n=16). Group II was formed of 11 patients with paroxysmal ventricular tachycardia and dilated cardiomyopathy or chronic myocarditis. ab1-AR were determined in blood serum by direct immunoassay. Synthetic fragment containing 26 amino acids of ab1-AR second loop was used as antigen. Groups I (54.8%) and II (63.6%) showed similar prevalence of ab1-AR, which was significantly higher than in control subjects (10%) (p<0.005). HRV parameters in I group were lower in ab1-AR-positive compared with ab1-AR-negative patients. At the same time HRV parameters in ab1-AR-positive patients were significantly different from those in controls (p<0.05). In group II HRV parameters of ab1-AR-positive and ab1-AR-negative patients were significantly lower than in control subjects (p<0.05). We suppose, that ab1-AR could participate in dysfunction of chronotropic heart regulation and contribute to development of arrhythmias in patients with structurally normal hearts.
authors.forename: T Ia
authors.initials: TIa
authors.lastname: Nikitina
authors.forename: M S
authors.initials: MS
authors.lastname: Bekbosynova
authors.forename: S P
authors.initials: SP
authors.lastname: Golitsyn
authors.forename: D S
authors.initials: DS
authors.lastname: Novikova
authors.forename: N V
authors.initials: NV
authors.lastname: Loladze
authors.forename: A G
authors.initials: AG
authors.lastname: Tonevitskiĭ
mesh_terms: D000328:Adult; D001323:Autoantibodies / Q000276:immunology*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000276:immunology* / Q000503:physiopathology*; D018342:Receptors, Adrenergic, beta-1 / Q000276:immunology*; D013610:Tachycardia / Q000276:immunology* / Q000503:physiopathology*
chemical_list: D001323:Autoantibodies; D018342:Receptors, Adrenergic, beta-1