Determination of fetal heart rate short-term variation from umbilical artery Doppler waveforms.
LS Cahill, G Stortz, A Ravi Chandran, N Milligan, S Shinar, CL Whitehead, SR Hobson, S Millard, CK Macgowan, JC Kingdom, JG Sled, AA Baschat
Ultrasound Obstet Gynecol | Published : 2021
OBJECTIVE: To evaluate the feasibility of using umbilical artery (UA) Doppler waveforms to measure fetal heart rate (FHR) short-term variation (STV) across gestation. METHODS: This was a prospective longitudinal study, conducted at two study sites, of 195 pregnancies considered low risk. Pulsed-wave Doppler of the UAs was performed at 4-weekly intervals, between 14 and 40 weeks of gestation, using a standardized imaging protocol. Up to 12 consecutive UA Doppler waveforms were analyzed using offline processing software. FHR STV was calculated using average R-R intervals extracted from the waveforms and baseline corrected for FHR. RESULTS: Baseline-corrected FHR STV increased significantly wit..View full abstract
Awarded by NICHD NIH HHS