TY - JOUR
T1 - Doppler Flowmeter-Assessed Circadian Rhythms in Neonatal Cardiac Function, Family History, and Intrauterine Growth Retardation
AU - Wang, Z.
AU - Sun, X.
AU - Cornelissen-Guillaume, Germaine G
AU - Wu, J.
AU - Meng, L.
AU - Cai, D.
AU - Xue, Z.
AU - Halberg, F.
PY - 1993/3
Y1 - 1993/3
N2 - This study examines the circadian variation of aortic blood flow velocity, acceleration, and distance of stroke, assessed every 4 hours for 24 hours by Doppler ultrasound in 88 human newborns. Groups 1 and 2 involve neonates with a negative family history of high blood pressure or myocardial infarction monitored during the first day or between the second and tenth days postpartum, respectively; groups 3 to 6 are 2- to 10-day-old babies with a positive family history of high blood pressure (group 3) or of myocardial infarction (group 4) or with a negative family history and intrauterine growth retardation (group 5) or born prematurely (group 6). Cosinor analyses demonstrate a circadian rhythm for all variables in groups 2 and 5 (p <0.001), with overall high values occurring around 17:40. In group 2, a circadian rhythm remains demonstrable in boys and girls considered separately, and mostly so in arbitrary subgroups of different sizes, with only slight differences in rhythm parameters among them. These results show that, with relatively small samples, reproducible circadian rhythms of cardiac function can be detected shortly after birth in neonates with a negative family history of high blood pressure or myocardial infarction.
AB - This study examines the circadian variation of aortic blood flow velocity, acceleration, and distance of stroke, assessed every 4 hours for 24 hours by Doppler ultrasound in 88 human newborns. Groups 1 and 2 involve neonates with a negative family history of high blood pressure or myocardial infarction monitored during the first day or between the second and tenth days postpartum, respectively; groups 3 to 6 are 2- to 10-day-old babies with a positive family history of high blood pressure (group 3) or of myocardial infarction (group 4) or with a negative family history and intrauterine growth retardation (group 5) or born prematurely (group 6). Cosinor analyses demonstrate a circadian rhythm for all variables in groups 2 and 5 (p <0.001), with overall high values occurring around 17:40. In group 2, a circadian rhythm remains demonstrable in boys and girls considered separately, and mostly so in arbitrary subgroups of different sizes, with only slight differences in rhythm parameters among them. These results show that, with relatively small samples, reproducible circadian rhythms of cardiac function can be detected shortly after birth in neonates with a negative family history of high blood pressure or myocardial infarction.
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U2 - 10.1055/s-2007-994642
DO - 10.1055/s-2007-994642
M3 - Article
C2 - 8476474
AN - SCOPUS:0027502483
SN - 0735-1631
VL - 10
SP - 119
EP - 125
JO - American Journal of Perinatology
JF - American Journal of Perinatology
IS - 2
ER -