Document Detail

Blunted Heart Rate Circadian Rhythms in Small for Gestational Age Infants during the Early Neonatal Period.
MedLine Citation:
PMID:  22307843     Owner:  NLM     Status:  Publisher    
Infants born with intrauterine growth restriction are at increased risk for adverse cardiovascular outcomes in neonatal and later life. Although circadian rhythm is a prognostic marker of cardiovascular health, the concern over the circadian rhythm of these infants is rarely observed. To determine the influence of intrauterine growth retardation on the pattern of circadian rhythm, heart rate (HR) circadian rhythmicity was analyzed in 39 small for gestational age (SGA; birth weight and height below <-2.0 standard deviation score [SDS]) and 117 appropriate for gestational age (AGA; >-1.5 to <1.5 SDS) infants within 72 hours of birth using spectral analysis and cosinor analysis. Amplitude, midline estimating statistic of rhythm, and acrophase calculated from circadian rhythm were analyzed with clinical variables. A significant HR circadian rhythm was observed in 23.1% of the SGA and 24.8% of the AGA group without significant differences; however, SGA infants exhibited remarkable smaller amplitudes compared with AGA in all gestational age (GA) groups (p < 0.001). Amplitudes in AGA infants were positively correlated with the GA or body composition relevant variables (p < 0.001, respectively), but not SGA infants. The blunted HR circadian rhythmicity in SGA infants showed in this study might indicate the vulnerability to pathophysiological condition and could potentially refer to cardiovascular disease in later life.
Esmot Ara Begum; Motoki Bonno; Naoya Sasaki; Yusuke Omori; Kazuyuki Matsuda; Noriko Sugino; Shigeki Tanaka; Hatsumi Yamamoto; Masaru Ido
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-3
Journal Detail:
Title:  American journal of perinatology     Volume:  -     ISSN:  1098-8785     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8405212     Medline TA:  Am J Perinatol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.
Clinical Research Institute, National Hospital Organization, Miechuo Medical Center, Hisaimyojin Cho, Tsu, Mie, Japan.
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