The objective of this study was to determine whether reclassification of hypertensive status using the 2017 American College of Cardiology/American Heart Association (ACC/AHA) guideline definition better identifies women at risk for preeclampsia or eclampsia and adverse fetal/neonatal events compared with the current American College of Obstetricians and Gynecologists (ACOG) definition of hypertension. Findings suggest that using the lower diagnostic threshold for hypertension recommended in the 2017 ACC/AHA guideline increased the prevalence of chronic and gestational hypertension, markedly improved the appropriate identification of women who would go on to develop preeclampsia, and was associated with the identification of adverse fetal/neonatal risk.


  1. Darwin KC, Federspiel JJ, Schuh BL, Baschat AA, Vaught AJ. ACC-AHA diagnostic criteria for hypertension in pregnancy identifies patients at intermediate risk of adverse outcomes. American Journal of Perinatology. 2020 May 23.

  2. Lai J, Syngelaki A, Nicolaides KH, von Dadelszen P, Magee LA. Impact of new definitions of preeclampsia at term on identification of adverse maternal and perinatal outcomes. American Journal of Obstetrics and Gynecology. 2020 Nov 6.

  3. Reddy M, Fenn S, Rolnik DL, Mol BW, da Silva Costa F, Wallace EM, Palmer KR. The impact of the definition of preeclampsia on disease diagnosis and outcomes: a retrospective cohort study. American Journal of Obstetrics and Gynecology. 2021 Feb 1;224(2):217-e1.


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