Fetal heart rate pattern with baseline value of approximately bpm and repetitive late decelerations. However, late decelerations and variable decelerations with late return have the same clinical significance and represent nonreassuring patterns. Reflex late decelerations are thought to be due to vagal stimulation by chemoreceptors in the head in response to low oxygen tension. After excluding these potential confounding etiologies, and if combined with other FHR abnormalities, the index of suspicion for fetal compromise should be increased. Leading US experts have been participated in its development. Not surprisingly, most authors have reported that only under extreme circumstances e.
Here is an example of absent variability:
Interpretation of the Electronic Fetal Heart Rate During Labor
Results in this range must also be interpreted in light of the FHR pattern and the progress of labor, and generally should be repeated after 15 to 30 minutes. Nonreflex late decelerations, however, are associated with decreased or absent FHR variability. These episodic accelerations are generally in response to fetal movement, with a need for increased perfusion, and therefore transiently increased sympathetic tone, or due to fetal stimulation, such as scalp stimulation with a vaginal exam, abdominal palpation, or vibroacoustic stimulation. Intrapartum fetal heart rate monitoring. With relief of the umbilical cord occlusion, the sequence is reversed.