title: [Circadian variations in the frequency of arrhythmia and quantitative analysis of rhythm disturbances].
abstract: In 29 patients with long term ECG monitoring the circadian rhythm of extrasystoles was investigated. A decrease of maximal frequency of extrasystoles was calculated for each hour and an increase of the minima during night was detected. In 77% of the patients also for 6 hour-segments a circadian rhythm could be calculated. The effect of the antiarrhythmic treatment on the frequency of extrasystoles was different depending on the frequency of the sinus rhythm.
mesh_terms: D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001145:Arrhythmias, Cardiac / Q000175:diagnosis*; D005117:Cardiac Complexes, Premature / Q000175:diagnosis; D002940:Circadian Rhythm / Q000187:drug effects; D004562:Electrocardiography; D006339:Heart Rate / Q000187:drug effects; D006801:Humans
chemical_list: D000889:Anti-Arrhythmia Agents
vernacular_title: Zirkadiane Schwankungen der Arrhythmiehäufigkeit und quantitative Analyse von Rhythmusstörungen.