TY - JOUR
T1 - Heart Rate Cyclicity During Labor in Healthy Term Fetuses
AU - Petrikovsky, Boris M.
AU - Vintzileos, Anthony M.
AU - Nochimson, David J.
PY - 1989/7
Y1 - 1989/7
N2 - Fifty-four intrapartum fetal heart rate (FHR) tracing were subjected to retrospective analysis of the presence, length, and frequency of cyclic changes in long-term variability (cyclicity). All patients had spontaneous uncomplicated labor and received no narcotics or analgesics. The following cycles were identified according the difference in long-term variability in terms of amplitude range: cycle A, 0 to 2.5 beats/min; cycle B, 3 to 5 beats/ min; cycle C, 6 to 10 beats/min; and cycle D, 11 to 20 beats/min. The frequency and length of FHR cycles was established in the latent, active phases and second stage of labor. Periods of diminished variability should be followed by fetal acid-base assessment only if their duration exceeds the established norms.
AB - Fifty-four intrapartum fetal heart rate (FHR) tracing were subjected to retrospective analysis of the presence, length, and frequency of cyclic changes in long-term variability (cyclicity). All patients had spontaneous uncomplicated labor and received no narcotics or analgesics. The following cycles were identified according the difference in long-term variability in terms of amplitude range: cycle A, 0 to 2.5 beats/min; cycle B, 3 to 5 beats/ min; cycle C, 6 to 10 beats/min; and cycle D, 11 to 20 beats/min. The frequency and length of FHR cycles was established in the latent, active phases and second stage of labor. Periods of diminished variability should be followed by fetal acid-base assessment only if their duration exceeds the established norms.
UR - http://www.scopus.com/inward/record.url?scp=0024334121&partnerID=8YFLogxK
U2 - 10.1055/s-2007-999595
DO - 10.1055/s-2007-999595
M3 - Article
C2 - 2730733
AN - SCOPUS:0024334121
SN - 0735-1631
VL - 6
SP - 289
EP - 291
JO - American Journal of Perinatology
JF - American Journal of Perinatology
IS - 3
ER -