Power spectrum analysis of heart rate and blood flow velocity variability measured in the umbilical and uterine arteries in early pregnancy: a comparative study

Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology
P C StruijkJ W Wladimiroff

Abstract

To compare power spectral derived variability parameters from the fetal side of the placental circulation with those from the maternal side of the placental circulation, during early pregnancy. Doppler velocity waveforms were obtained from both the umbilical and the uterine arteries in a study group of 40 pregnant women between 10 and 14 (n = 25) and 15 and 20 (n = 15) weeks of gestation. The coefficient of variation of both the beat-to-beat heart rate variability and the blood flow velocity variability was determined. The ratio of the integrated low-frequency components (< 0.2 Hz) and the integrated high-frequency components (> 0.2 Hz) from normalized power spectrum analysis (LH-ratio) was established, to reflect sympathovagal balance. The coefficient of variation and LH-ratio of fetal heart rate variability constitute only a fraction of the same maternal heart rate variability parameters. Nevertheless a highly significant increase (P < 0.001) in LH-ratio was demonstrated with advancing gestational age. The coefficient of variation and LH-ratio of blood flow velocity variability were significantly lower in the fetal umbilical artery only in the 10-14-weeks' gestation group. Due to a decrease of the maternal uterine blood flow ...Continue Reading

Citations

Jun 7, 2005·Ultrasound in Medicine & Biology·Konstantinos VarsamidisGeorgios Mavropoulos
May 14, 2004·Annals of the Rheumatic Diseases·L TerslevH Bliddal
Aug 16, 2005·Acta Obstetricia Et Gynecologica Scandinavica·Xiaotian LiGuoqiang Wu
May 14, 2004·European Journal of Obstetrics, Gynecology, and Reproductive Biology·Xiaotian LiLinlin Shen
Dec 8, 2016·Journal of Obstetrics and Gynaecology : the Journal of the Institute of Obstetrics and Gynaecology·Natascia GiulianoDomenico Arduini
Feb 19, 2004·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·A S M VinkesteijnJ W Wladimiroff
Nov 1, 2008·Archives of Women's Mental Health·Marysia J LazinskiMeir Steiner
Aug 26, 2006·Medical & Biological Engineering & Computing·William L ManerRobert E Garfield
May 11, 2004·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·A S M VinkesteijnJ W Wladimiroff

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