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Comparative Study
. 2004 Oct;191(4):1283-7.
doi: 10.1016/j.ajog.2004.03.018.

The effect of fetal behavioral states on middle cerebral artery peak systolic velocity

Bahauddin I Sallout  1 , Karen Fung Kee Fung, Shi W Wen, Laura M Medd, Mark C Walker
Affiliations
Comparative Study

The effect of fetal behavioral states on middle cerebral artery peak systolic velocity

Bahauddin I Sallout et al. Am J Obstet Gynecol. 2004 Oct.

Abstract

Objective: This study was undertaken to determine whether is there a difference in the middle cerebral artery peak systolic velocity (MCA PSV) between active and resting behavioral states in healthy fetuses aged 30 to 32 weeks.

Methods: MCA blood flow was measured by pulsed Doppler sonography 3 times during each fetal behavioral state (active and resting). The average during active state was compared during the resting state. Statistical analysis was performed by paired t test.

Results: During the fetal active state, there was a significant increase in the mean PSV (51.59 cm/s vs 46.95 cm/s, P < .0001) and mean end-diastolic velocity (9.59 cm/s vs 7.98 cm/s, P=.0015), and a significant decrease in the mean pulsatility index (PI) (2.07 vs 2.19, P=.0226) and the mean resistance index (0.83 vs 0.85, P=.0481).

Conclusion: Healthy preterm fetuses have a significantly higher MCA PSV during the active state. Activity state should be considered when interpreting MCA Doppler indices.

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