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s / Placenta 36 (2015) 469e521 510 PB.12. PREECLAMPSIA AND PREECLAMPSIA SUPERIMPOSED ON CHRONIC HYPERTENSION IN BUENOS AIRES I. Corominas Ana , Balconi Silvia , Ortiz Maria , M. Castro-Parodi , E. Damiano Alicia . Hospital Nacional Prof. Dr. Alejandro Posadas, Buenos Aires, Argentina; 2 Laboratorio de Biologia de la Reproducci on, Departamento de Ciencias Biol ogicas, Facultad de Farmacia y Bioquimica, IFIBIO-CONICET, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina Preeclampsia superimposed on chronic hypertension is diagnosed when a woman with pre-existing hypertension develops systemic features of preeclampsia, after 20 weeks gestation. Its incidence varies among different populations and hospitals, but it has been estimated that up to 5% of pregnancies are affected. Objective: To study the prevalence and pregnancy records in women who developed Preeclampsia and superimposed Preeclampsia and to analyze the complications associated with both pathological conditions. Methods: A descriptive, quantitative and retrospective chart review was conducted on all the pregnancies with Preeclampsia and superimposed Preeclampsia attended at the Hospital Posadas, (Buenos Aires, Argentina) during 2010. Results: A total of 4845 births were attended at the Hospital Posadas during 2010. The occurrence of self-reported chronic hypertension in the anamnesis was 5.31%. Among the 4587 normotensive women, 83 developed preeclampsia (1.81%), while 28 (10.85%) of 258 hypertensive gestants had superimposed preeclampsia (incidence1⁄40.58%). The relative risk of preeclampsia for hypertensive pregnant women was 6.00 (3.98-9.03) (p |
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