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Ophthalmic Artery Doppler Velocimetric Values in Pregnant Women at Risk for Preeclampsia
Author(s) -
Matias Denise S.,
Costa Rigman F.,
Matias Bruno,
Gordiano Léo,
Correia Luis C. L.
Publication year - 2012
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.2012.31.10.1659
Subject(s) - medicine , preeclampsia , ophthalmic artery , obstetrics , pregnancy , doppler effect , cardiology , blood flow , genetics , physics , astronomy , biology
Objectives The purposes of this study were to describe ophthalmic artery Doppler parameters in pregnant women at risk for preeclampsia in the second trimester, compare them with reference values described in women with healthy pregnancies, and evaluate the association between gestational age and Doppler parameters. Methods We conducted an observational study with prospective data collection in which measurements of 7 ophthalmic artery Doppler parameters were obtained in 274 women at 20 to 28 weeks' gestation with clinical risk factors for preeclampsia. The following measurements were obtained: peak systolic velocity, mesodiastolic velocity, mean velocity, end‐diastolic velocity, resistive index, pulsatility index, and peak ratio. The observed Doppler values were compared with reference values by a 1‐sample t test. To test for linear associations between gestational age and Doppler parameters, the Pearson correlation coefficient was used. Results Significantly higher ophthalmic artery Doppler velocimetric parameters were observed when compared with the reference values. The mean values of these parameters ± SD were as follows: peak systolic velocity, 37.9 ± 10.3 cm/s (reference, 34.2 cm/s; P < .001); end‐diastolic velocity, 7.2 ± 3.1 cm/s (reference, 6.8 cm/s; P = .03); resistive index, 0.81 ± 0.07 (reference, 0.70; P < .001); pulsatility index, 2.17 ± 0.53 (reference, 1.80; P < .001); and peak ratio, 0.53 ± 0.12 (reference, 0.40; P < .001). There was no correlation between the Doppler parameters and gestational age. Conclusions Ophthalmic Doppler parameters of women at risk for preeclampsia are significantly higher than reference values for healthy pregnancies, which may indicate an inadequate vascular response to persistent peripheral resistance. Gestational age during the second trimester is not associated with ophthalmic artery Doppler parameters in pregnant women at risk for preeclampsia.