The effect of fetal heart rate on umbilical artery flow velocity waveforms

1988 ◽  
Vol 95 (3) ◽  
pp. 315-316
Author(s):  
J. Eyck
Keyword(s):  
Heart Rate ◽  
Flow Velocity ◽  
Fetal Heart Rate ◽  
Umbilical Artery ◽  
Fetal Heart ◽  
Artery Flow

Correcting umbilical artery flow velocity waveforms for fetal heart rate is unnecessary

1989 ◽  
Vol 160 (3) ◽  
pp. 704-707 ◽  
Author(s):  
Alexander D. Kofinas ◽  
Mark Espeland ◽  
Melissa Swain ◽  
Mary Penry ◽  
Lewis H. Nelson
Keyword(s):  
Heart Rate ◽  
Flow Velocity ◽  
Fetal Heart Rate ◽  
Umbilical Artery ◽  
Fetal Heart ◽  
Artery Flow

Heart rate and flow velocity variability as determined from umbilical Doppler velocimetry at 10–20 weeks of gestation

1998 ◽  
Vol 95 (5) ◽  
pp. 539-545 ◽  
Author(s):  
Nicolette T. C. URSEM ◽  
Piet C. STRUIJK ◽  
Wim C. J. HOP ◽  
Edward B. CLARK ◽  
Bradley B. KELLER ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Flow Velocity ◽  
Fetal Heart Rate ◽  
Umbilical Artery ◽  
Parasympathetic Nervous System ◽  
Fetal Heart ◽  
Peak Systolic Velocity ◽  
Fetal Heart Rate Variability ◽  
Artery Flow

1.The aim of this study was to define from umbilical artery flow velocity waveforms absolute peak systolic and time-averaged velocity, fetal heart rate, fetal heart rate variability and flow velocity variability, and the relation between fetal heart rate and velocity variables in early pregnancy. 2.A total of 108 women presenting with a normal pregnancy from 10 to 20 weeks of gestation consented to participate in a cross-sectional study design. Doppler ultrasound recordings were made from the free-floating loop of the umbilical cord. 3.Umbilical artery peak systolic and time-averaged velocity increased at 10–20 weeks, whereas fetal heart rate decreased at 10–15 weeks of gestation and plateaued thereafter. Umbilical artery peak systolic velocity variability and fetal heart rate variability increased at 10–20 and 15–20 weeks respectively. 4.The inverse relationship between umbilical artery flow velocity and fetal heart rate at 10–15 weeks of gestation suggests that the Frank–Starling mechanism regulates cardiovascular control as early as the late first and early second trimesters of pregnancy. A different underlying mechanism is suggested for the observed variability profiles in heart rate and umbilical artery peak systolic velocity. It is speculated that heart rate variability is mediated by maturation of the parasympathetic nervous system, whereas peak systolic velocity variability reflects the activation of a haemodynamic feedback mechanism.

Correcting umbilical artery flow velocity waveforms for fetal heart rate is unnecessary

1989 ◽  
Vol 30 (3) ◽  
pp. 291-291
Author(s):  
AD Kofinas ◽  
M Espeland ◽  
M Swain ◽  
M Penry ◽  
LH Nelson
Keyword(s):  
Heart Rate ◽  
Flow Velocity ◽  
Fetal Heart Rate ◽  
Umbilical Artery ◽  
Fetal Heart ◽  
Artery Flow

Assessment of umbilical artery flow and fetal heart rate to predict delivery time in bitches

2016 ◽  
Vol 86 (7) ◽  
pp. 1654-1661 ◽  
Author(s):  
Amália Turner Giannico ◽  
Daniela Aparecida Ayres Garcia ◽  
Elaine Mayumi Ueno Gil ◽  
Marlos Gonçalves Sousa ◽  
Tilde Rodrigues Froes
Keyword(s):  
Heart Rate ◽  
Fetal Heart Rate ◽  
Umbilical Artery ◽  
Fetal Heart ◽  
Delivery Time ◽  
Artery Flow

Maternal and Fetal Haemodynamics during Late Pregnancy: Effect of Compression Hosiery Treatment

1993 ◽  
Vol 8 (4) ◽  
pp. 155-157 ◽  
Author(s):  
C. Austrell ◽  
L. Nilsson ◽  
L. Norgren
Keyword(s):  
Heart Rate ◽  
Flow Velocity ◽  
Fetal Heart Rate ◽  
Uterine Artery ◽  
Fetal Heart ◽  
Late Pregnancy ◽  
Vascular Response ◽  
Compression Stockings ◽  
Gestational Week ◽  
Artery Flow

Objective: To study the effect of graduated compression on maternal and fetal haemodynamics. Design: Measurement of maternal and fetal heart rate and uterine artery flow velocity ( Vmax) in supine and standing positions with and without graduated compression hosiery (25 mmHg at the ankle). Setting: Department of Surgery, Lund University, S-22185 Lund, Sweden. Patients: Eighteen women in gestational week 32–38. Results: An increase in heart rate on standing was recorded for both mother and fetus. Graduated compression stockings decreased these changes. Cyclic heart rate changes were not frequent. Uterine artery flow velocity did not change during change of posture or after compression. Conclusion: The utero-vascular syndrome was not common in the patients studied. Graduated compression reduced the vascular response to standing, measured as an increase of heart frequency at standing.

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