High blood pressure after birth (mother)

High blood pressure that is still present in the weeks and months after a baby is born. After a pregnancy with pre-eclampsia or gestational hypertension, some women still need blood pressure medicine when they go home, and their blood pressure is checked after birth. The abstract of one UK trial notes that high blood pressure in pregnancy is followed by a higher rate of high blood pressure and heart and blood vessel disease later in life.

Condition
In this atlas

Overview

Technical summary

The clearest case in this atlas is the population of a UK trial of home monitoring: women aged 18 or older after a pregnancy complicated by pre-eclampsia (60%) or gestational hypertension (40%), still needing blood pressure medicine when discharged. In that trial self-monitoring with physician-guided medicine changes was followed by lower blood pressure at about 9 months (see the intervention page). The trial abstract states that pregnancy hypertension results in adverse cardiac remodelling and a higher incidence of hypertension and cardiovascular disease later in life; it gives no figures for that statement. The postnatal care page records a recommendation to measure every postpartum woman's blood pressure shortly after birth. This page makes no statement about thresholds or targets, which no source read here gives. It links to the core record for peripartum cardiomyopathy. The trial excluded women with pre-existing hypertension (registry), so it says nothing about chronic hypertension, and no source read here covers new-onset high blood pressure after birth.

Burden

No burden claims are published.

Claims and evidence

No claims are published for this condition yet.

Clinical links

Each link reports what one cited claim says about one population. "Evaluated for" means studied, not shown to work. These links do not show that anything is effective or right for you.

Claim, not a settled fact Evaluated for this: Blood pressure self-monitoring and physician-guided dose changes after birth (Evaluated for, seen from the other side)
Applies to Maternal
- Women aged 18 years or older whose pregnancy was complicated by pre-eclampsia or gestational hypertension and who needed blood pressure medicine after birth when they were discharged (abstract eligibility). In the trial, 40% had gestational hypertension and 60% had pre-eclampsia, and the mean age was 32.6 years. The outcome is the woman's own blood pressure, so the recipient and the measured population are the same. The registry excludes women with pre-existing hypertension.
- A single hospital in the UK (abstract). The registry lists two sites, both in Oxford.
- United Kingdom
- Postnatal period: the primary outcome was measured about 249 days after birth, in the first 9 months postpartum
- Gestational age Not reported
- Postnatal age Not reported
Follow-up About 9 months after birth (abstract). The 24-hour blood pressure was measured at about 249 days postpartum. The registry gives the primary outcome time frame as 6 months postpartum.
In POP-HT, a randomised trial at a single UK hospital, 220 women who had had pre-eclampsia or gestational hypertension and still needed blood pressure medicine at discharge were assigned to self-monitoring with doctor-guided changes in their medicine (112 women) or to usual postnatal care (108 women). Of them, 200 (91%) were in the primary analysis. At about 249 days after birth, 24-hour mean diastolic blood pressure was 71.2 mm Hg with the intervention and 76.6 mm Hg with usual care, a between-group difference of -5.80 mm Hg (95% CI -7.40 to -4.20; P < .001). Systolic pressure was 114.0 and 120.3 mm Hg, a difference of -6.51 mm Hg (95% CI -8.80 to -4.22; P < .001).
Limitations. The trial was open-label with a blinded end point, run at one site, and the authors call the result an association in a single-centre trial. The outcome is blood pressure, not a heart or blood vessel event; the abstract reports no such events. The registry record was last updated on 2021-10-22 and still lists an estimated enrolment of 200, an estimated primary completion date of 2022-04-01 and a primary outcome time frame of 6 months, against 220 randomised and 9 months in the paper. The two records are kept side by side and are not reconciled. Only the PubMed abstract was read; the PMC copy is not in the open access subset.

Record details

Record id: maternal:postpartum-hypertension
Content hash: c6287e57080f536c37d390da06e086816e47cbd2e0133a016ea8c6f2b031ed8f