The relationship between fetal heart rate and Doppler blood flow velocity waveforms.
The degree of fetal heart rate dependency of pulsatility index measurements in the fetal descending aorta, internal carotid artery, and umbilical artery was studied relative to quiet and active sleep states in normal and growth-retarded fetuses at 37-38 weeks of gestation. In all vessels an inverse relationship between pulsatility index and heart rate was established. The degree of this inverse relationship varies proportionally with the level of peripheral vascular resistance in the vessels studied.
Van Den Wijngaard
J A
JA
Academic Hospital Rotterdam-Dijkzigt, Erasmus University Rotterdam, The Netherlands.
Van Eyck
J
J
Wladimiroff
J W
JW
D001013:Aorta, Thoracic / Q000502:physiology; D001783:Blood Flow Velocity; D002343:Carotid Artery, Internal / Q000502:physiology; D005133:Eye Movements; D005260:Female; D005317:Fetal Growth Retardation / Q000175:diagnosis / Q000503:physiopathology; D005333:Fetus / Q000502:physiology; D006340:Heart Rate, Fetal; D006801:Humans; D009068:Movement; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011674:Pulse; D014463:Ultrasonography; D014469:Umbilical Arteries / Q000502:physiology