title: [Spontaneous changes of ventricular ectopic beats in ischemic patients and subjects without other signs of cardiopathy].
abstract: Spontaneous variability of premature ventricular complexes was evaluated by 72 hour continuous ambulatory electrocardiographic monitoring in 38 patients. Nineteen patients had coronary artery disease and 19 subjects had no documented signs of cardiac disease. Using multifactorial analysis of variance we determined the minimal percent reduction of premature ventricular complexes frequency that could not be ascribed to spontaneous variability alone in both single subject and in groups of 10 and 19 individuals and analyzed the difference between the two groups of ischemic and healthy patients. Our results show that in each subject with or without coronary artery disease the minimal reduction of premature ventricular complexes is similar: 71% and 72% respectively. On the other hand when the two groups were compared the percentage of reduction was 49% in healthy subjects and 40% in patients with coronary artery disease. Spontaneous variability of premature ventricular complexes decreases as the period of monitoring lengthens; however the improvement obtained with longer electrocardiographic monitoring doesn't justify the prolongation of the examination beyond 24 hours.
mesh_terms: D000368:Aged; D000553:Ambulatory Care; D000704:Analysis of Variance; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D003327:Coronary Disease / Q000503:physiopathology*; D004562:Electrocardiography / Q000379:methods; D005260:Female; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged
vernacular_title: Variabilità spontanea dei battiti ectopici ventricolari in pazienti ischemici ed in soggetti senzi altri segni di cardiopatia.