P reeclampsia is a serious hypertensive pregnancy disorder complicating 2% to 5% of all pregnancies. Preeclampsia is characterized by hypertension and proteinuria after 20 weeks of gestation. Women with a history of preeclampsia are at increased risk to develop early onset cardiovascular disease (CVD) later in life when compared with women who had an uneventful pregnancy.1 Therefore, in 2011, the American Heart Association added preeclampsia to the list of risk factors for developing CVD.2 The mechanistic explanation for the link between preeclampsia and later CVD remains to be elucidated.
3Numerous studies demonstrated increased prevalence of cardiovascular risk factors after a pregnancy complicated by preeclampsia. [4][5][6] Most formerly preeclampsia women, however, do not demonstrate a traditional cardiovascular risk profile within the first years after preeclampsia.6 Yet, when compared with healthy parous controls, the relative risk of developing chronic hypertension within 15 years after preeclampsia is estimated 3.7 (95% confidence interval, 2.7-5.5).1 This observation indicates that a subset of normotensive formerly preeclampsia women is at risk to develop hypertension within the first years after the affected pregnancy. It is conceivable that these formerly preeclampsia women have subtle or latent abnormalities that could explain the increased cardiovascular risk after pregnancy.Low plasma volume (PV) is considered to reflect latent hypertension, 7 and normotensive formerly preeclampsia women with low PV (LPV) are prone to develop recurrent hypertensive disease in subsequent pregnancy. 8 Whether PV status also relates to chronic hypertension after a pregnancy complicated by preeclampsia has never been studied before. We hypothesized that LPV status in normotensive formerly preeclampsia women predisposes to the development of hypertension. In this longitudinal study, we additionally studied how the traditional cardiovascular and metabolic risk profiles evolve over time after a preeclamptic pregnancy.Abstract-Formerly preeclamptic women are at risk for cardiovascular disease. Low plasma volume may reflect latent hypertension and potentially links preeclampsia with chronic cardiovascular disease. We hypothesized that low plasma volume in normotensive formerly preeclamptic women predisposes to hypertension. We longitudinally studied n=104 formerly preeclamptic women in whom plasma volume was measured 3 to 30 months after the preeclamptic pregnancy. Cardiovascular variables were assessed at 2 points in time (3-30 months postpartum and 2-5 years thereafter). Study population was divided into low plasma volume (≤1373 mL/m 2 ) and normal plasma volume (>1373 mL/m 2 ). Primary end point was hypertension at the second visit: defined as ≥140 mm Hg systolic or ≥90 mm Hg diastolic. Secondary outcome of this study was change in traditional cardiovascular risk profile between visits. Variables correlating univariately with change in blood pressure between visits were introduced in regression analysis. Eighteen of 104 ...