title: [Circadian variability of cardiac arrhythmias in patients with cardiovascular diseases].
abstract: A total of 1063 results of Holter monitoring in patients with cardiovascular diseases were analyzed. There were regularities in the circadian rhythm of arrhythmias with their decreased values at night and increased ones in the daytime, and peak in the morning. The profile of rhythm depends on the pattern of arrhythmia and cardiac disease. The main oscillators are as follows: sleep-awakening, activity-rest patterns, circadian variations in the sympathetic tone, severity of disease, diurnal variations in myocardial oxygen demand, blood pressure, cardiosclerosis. Conduction disturbances were increased during sleep and early in the morning. Thus, the main unfavourable period in arrhythmia disturbances are early morning, pre- and postawakening periods.
authors.forename: S B
authors.initials: SB
authors.lastname: Shustov
authors.forename: V A
authors.initials: VA
authors.lastname: Iakovlev
authors.forename: V P
authors.initials: VP
authors.lastname: Kitsyshin
mesh_terms: D000328:Adult; D001145:Arrhythmias, Cardiac / Q000150:complications / Q000503:physiopathology*; D002940:Circadian Rhythm / Q000502:physiology*; D015716:Electrocardiography, Ambulatory; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008945:Mitral Valve Prolapse / Q000150:complications* / Q000503:physiopathology; D017202:Myocardial Ischemia / Q000150:complications* / Q000503:physiopathology; D009449:Neurocirculatory Asthenia / Q000150:complications* / Q000503:physiopathology