title: [Heart rate-ventricular extrasystole relations and their dependence on circadian rhythms].
abstract: The linear correlation of the circadian rhythms (CR) of heart rate (HR) with those of ventricular extrasystole (VE) is analyzed by electrocardiographic ambulatory monitoring in 32 patients: 22 with ischemic post-infarction cardiopathy (group A) and ten free of structural cardiopathy (group B). Variability expressed as the coefficient of ventricular extrasystole variation (100 x standard deviation/mean) presented an inverse correlation with the number of recording extrasystoles. Linear correlation between HR and VE was statistically significant in 72% of recordings in group A, and in 60% in group B. The percentage of cases with significant linear correlation was greater on analyzing the three-minute periods than with the longer periods. When the cases analyzed presented over 200 extrasystoles, the percentage with significant linear correlation between HR and extrasystole was greater in group A than in group B. The circadian rhythm of the ventricular extrasystoles using interpolation of a cosinor function was significant in 50% of group A cases, and in 60% of group B. The achrophases were diurnal in group B, but only in 45% of cases in group A, two correspondence models being found between the CR achrophases and the inverse linear correlation between HR and VE.
authors: M
authors: M
authors: Burguera
authors: V
authors: V
authors: López-Merino
authors: R
authors: R
authors: García-Civera
authors: J
authors: J
authors: Chorro
authors: R
authors: R
authors: Ruiz-Granell
authors: J
authors: J
authors: Sanchís
mesh_terms: D000293:Adolescent; D000328:Adult; D005117:Cardiac Complexes, Premature / Q000209:etiology / Q000503:physiopathology*; D002940:Circadian Rhythm; D005260:Female; D006339:Heart Rate; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications*; D012189:Retrospective Studies; D013997:Time Factors
vernacular_title: Estudio de las relaciones frecuencia-extrasistolia ventricular y su dependencia de ritmos circadianos.