Publications [#329681] of Amy H Herring
Papers Published
- Swartz, AE; Ruma, MS; Kim, E; Herring, AH; Menard, MK; Moise, KJ. "The effect of fetal heart rate on the peak systolic velocity of the fetal middle cerebral artery.." Obstetrics and gynecology 113.6 (June, 2009): 1225-1229. [doi]
(last updated on 2026/01/17)Abstract:
Objective
To estimate the effect of an increase in the basal heart rate of the fetus on the middle cerebral artery peak systolic velocity (MCA-PSV).Methods
This was a prospective longitudinal cohort. Patients between 14 and 36 weeks of gestation were enrolled (N=66). Ultrasound examinations were performed monthly. MCA-PSV measurements were assessed at 0-degree angle of insonation at basal fetal heart rate and after application of vibroacoustic stimulation.Results
A total of 514 MCA-PSV measurements were obtained in 66 fetuses. No difference in fetal heart rate before and after vibroacoustic stimulation was noted before 27 weeks of gestation. A significant increase in fetal heart rate after vibroacoustic stimulation was detected from a mean+/-standard deviation gestational age of 27.1+/-1.3 weeks onward. A significant decrease in the MCA-PSV was noted between before vibroacoustic stimulation and after vibroacoustic stimulation measurements for examinations 3,4, and 5 (P<.001 for all).Conclusion
Acceleration of the fetal heart rate in the third trimester is associated with a decrease in the middle cerebral artery peak systolic velocity. Assessment of the MCA-PSV for the detection of fetal anemia, particularly in the third trimester, should be undertaken during a period of baseline fetal heart rate to avoid the potential of a false-negative result.Level of evidence
II.