Impaired Flow-Mediated Dilation Before, During, and After Preeclampsia

Author:

Weissgerber Tracey L.1,Milic Natasa M.1,Milin-Lazovic Jelena S.1,Garovic Vesna D.1

Affiliation:

1. From the Division of Nephrology and Hypertension, Mayo Clinic, Rochester, MN (T.L.W., N.M.M., V.D.G.); and Department of Biostatistics, Medical Faculty, University of Belgrade, Serbia (N.M.M., J.S.M.-L.).

Abstract

Endothelial dysfunction is believed to play a critical role in preeclampsia; however, it is unclear whether this dysfunction precedes the pregnancy or is caused by pathophysiological events in early pregnancy. It is also unclear for how long vascular dysfunction may persist postpartum and whether it represents a mechanism linking preeclampsia with future cardiovascular disease. Our objective was to determine whether women with preeclampsia had worse vascular function compared with women who did not have preeclampsia by performing a systematic review and meta-analysis of studies that examined endothelial dysfunction using flow-mediated dilation. We included studies published before May 29, 2015, that examined flow-mediated dilation before, during, or after preeclampsia. Differences in flow-mediated dilation between study groups were evaluated by standardized mean differences. Out of 610 abstracts identified through PubMED, EMBASE, and Web of Science, 37 studies were eligible for the meta-analysis. When compared with women who did not have preeclampsia, women who had preeclampsia had lower flow-mediated dilation before the development of preeclampsia (≈20–29 weeks gestation), at the time of preeclampsia, and for 3 years postpartum, with the estimated magnitude of the effect ranging between 0.5 and 3 standard deviations. Similar effects were observed when the analysis was limited to studies that excluded women with chronic hypertension, smokers, or both. Vascular dysfunction predates preeclampsia and may contribute to its pathogenesis. Future studies should address whether vascular changes that persist after preeclamptic pregnancies may represent a mechanistic link with increased risk for future cardiovascular disease.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Internal Medicine

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