Significance of the sinusoidal fetal heart rate pattern

Fetal anemia and heart rate patterns

“…Recently we have found one sinusoidal FHR pattern in a postmature fetus, but a coexisting anemia was also detected. Our recent material of FHR variability with more than 500 samples of FHR recorded by abdominal fetal electrocardiography during 65 normal pregnancies does not contain a single sinusoidal period, nor does the group of suspected intrauterine growth retardation contain It has been suggested that a sinusoidal FHR pattern is a sign of impending fetal death [16,7,10]. In this material the fetal outcome after the sinusoidal FHR pattern was poorer than without this pattern, but the difference was not significant.…”

Retrospective study of the effect of remifentanil use during labor on fetal heart rate patterns

“…The latter observation is comparable to earlier studies that have described these patterns as pseudo-SHR patterns associated with good fetal outcomes. [13][14][15] Studies from Murphy et al 13 and Neesham et al 24 have attempted to classify SHR patterns according to the amplitude of oscillations with the aim of quantifying fetal risk. All SHR patterns in the present study F I G U R E 1 FHR trace in a patient who exhibited a SHR pattern after administration of remifentanil.…”

“…The reported incidence during labor varies from 4.2% to 15%. [13][14][15] They have been related to different causes including fetal sucking movements and regular mouthing. 16,17 Narcotic analgesics, administered to patients during labor have also been reported to be a potential cause.…”

Review article

“…Information is also supplied by a few series of patients with a selected obstetrical problem such as Rh immunization, anemia, drug administration, etc., but the validity of conclusions cannot be extended to other classes of patients. Fortunately, a few investigators, studied, either retrospectively [41,75] or even prospectively [43, 64,67], the etiology, the clinical significance and the outcome of a greater number of pregnancies in which SHR was noted.…”

“…The relationship between these two entities is suggested by the high incidence of this ing of Rh sensitized mothers [1,10,41,58,69] observed this specific pattern in 12 to 40% of the fetuses (table VII).…”