What is a sinusoidal FHR pattern indicative of?

A sinusoidal fetal heart rate (FHR) pattern is characterized by a smooth, undulating waveform that typically lasts for at least 20 minutes and can suggest significant fetal distress. This pattern is most often associated with central nervous system (CNS) damage due to factors such as fetal hypoxia or other conditions affecting the brain. The sinusoidal pattern indicates a lack of variability in FHR, which is concerning because it suggests that the fetus may be experiencing a level of distress that could be damaging to the neurological status.

Understanding the implications of a sinusoidal pattern is crucial for monitoring fetal well-being during labor and delivery. Detailed evaluation and prompt action are necessary when this pattern is detected in order to improve outcomes for the fetus, reinforcing the significance of recognizing such abnormalities in FHR patterns within obstetric care.