NDLI: Characteristics of the cardiointervalogram in newborns during sleep

Content Provider	Springer Nature Link
Author	Evsyukova, I. I. Kondrat’eva, M. V.
Copyright Year	2005
Abstract	One hundred and seven healthy full-term newborns were examined in this study. The cardiointer-valogram (CIG) was continuously recorded on the fifth to seventh day of life. An electropolygram (EPG) was recorded in 14 newborns along with the CIG and included the electroencephalogram, electrooculogram, electrocardiogram, and pneumogram. The functional state of the infants was continuously monitored, and calm or active wakefulness and active or calm sleep were distinguished using common criteria. Quantitative analysis of the sleep EPG was used to differentiate sleep phases by a standard method. The CIG was analyzed during orthodox (OS) and paradoxical (PS) sleep, and three different CIG types were distinguished by visual assessment and differential criteria established previously. The three types of CIG considerably differed in the structure and power spectrum of slow oscillations of R-R intervals, especially in the range from 0.04 to 0.15 Hz. The type I CIG was recorded during OS. At the end of this phase, the variability range increased while the amplitude of the mode and the tension index were reduced, indicating the type II CIG, with a duration of 3–4 min. All three CIG types were observed during PS; the type III CIG dominated, accounting for 58.3 ± 4.6% of the phase duration. A relationship was found between the CIG types and the cyclic organization of sleep, pointing to a difference in mechanisms regulating the heart rate in different functional states of the central nervous system in newborns.
Starting Page	199
Ending Page	203
Page Count	5
File Format	PDF
ISSN	03621197
Journal	Human Physiology
Volume Number	31
Issue Number	2
e-ISSN	16083164
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2005-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biomedicine general Human Physiology Life Sciences
Content Type	Text
Resource Type	Article
Subject	Physiology Physiology (medical)

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