title: [Fetal heart rate and Doppler flow parameters in fetal blood vessels--evaluation of 2,517 individual signals].
abstract: Analysis of more than 2500 doppler flow signals in three patients was performed to evaluate the influence of fetal heart rate (fhr) variation on S/D-ratio in fetal vessels. Little differences of S/D-ratio in fetal vessels (descending aorta, umbilical arteries) were detected within the physiological variations of fhr (120-160 bpm) (envelope of regression line -0.007, -0.006). Analysing inter- as well as intraindividual variation only minor effects of fhr alteration can be observed in clinical application of doppler flow velocimetry. Dopplersonographic measurements, however, should be performed for at least a three minute period (for each vessel) to avoid false-positive or false-negative interpretation of short term changes of doppler signals. This is especially important in distressed fetuses.
authors.affiliation: Medizinische Universität zu Lübeck.
authors.forename: W
authors.initials: W
authors.lastname: Rühle
authors.forename: J
authors.initials: J
authors.lastname: Gnirs
authors.forename: W
authors.initials: W
authors.lastname: Schmidt
mesh_terms: D000328:Adult; D001011:Aorta / Q000000981:diagnostic imaging; D001783:Blood Flow Velocity / Q000502:physiology; D015148:Cardiotocography; D005260:Female; D005317:Fetal Growth Retardation / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006340:Heart Rate, Fetal / Q000502:physiology*; D006801:Humans; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange / Q000502:physiology*; D011225:Pre-Eclampsia / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011247:Pregnancy; D012016:Reference Values; D012815:Signal Processing, Computer-Assisted; D016216:Ultrasonography, Prenatal; D014469:Umbilical Arteries / Q000000981:diagnostic imaging
vernacular_title: Fetale Herzfrequenz und Doppler-Flow-Parameter in fetalen Gefässen--Auswertung von 2517 Einzelsignalen.