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[Notching of the bilateral uterine artery flow velocity wave-forms in the third trimester and perinatal
1Universitäts-Kliniken, Frauenklinik, Rheinisch-Westfälische Technische Hochschule, Aachen.
Pulsatile color duplex Doppler ultrasonography system was used to study blood flow velocity waveforms in the uterine arteries of 492 pregnant women in the third trimester. In 38 (7.7%) patients unilateral and in 42 (8.5%) bilateral postsystolic notches were observed. Those with bilateral early diastolic notches experienced poor perinatal outcome in 40 (95.2%) instances. The same occurred in 16 (42.1%) others with unilateral notches and in 13 (3.2%) without notches but with evidence of increased impedance (pulsatility index > 1.20, resistance index > 0.58 and systolic/diastolic ratio > 2.6). The presence of bilateral postsystolic notches in the uterine artery flow velocity waveforms appears to be a reliable predictor of poor pregnancy outcome.
Pulsatile color duplex Doppler ultrasonography system was used to study blood flow velocity waveforms in the uterine arteries of 492 pregnant women in the third trimester. In 38 (7.7%) patients unilateral and in 42 (8.5%) bilateral postsystolic notches were observed. Those with bilateral early diastolic notches experienced poor perinatal outcome in 40 (95.2%) instances. The same occurred in 16 (42.1%) others with unilateral notches and in 13 (3.2%) without notches but with evidence of increased impedance (pulsatility index > 1.20, resistance index > 0.58 and systolic/diastolic ratio > 2.6). The presence of bilateral postsystolic notches in the uterine artery flow velocity waveforms appears to be a reliable predictor of poor pregnancy outcome.