Short term sequelae of preeclampsia: a single center cohort study

Blood pressure control, hypertension phenotypes, and albuminuria: outcomes of the comprehensive Basel Postpartum Hypertension Registry

Postpartum hypertension (PPHT) affects 20% of pregnancies and is strongly correlated to cardiovascular and kidney disease. Most outcome data stems from preeclampsia (PE) neglecting other hypertensive disorders of pregnancy (HDP). This analysis aimed to investigate blood pressure (BP) control, BP phenotypes, therapeutic intensity scores (TIS), and albuminuria across the spectrum of PPHT in the short-medium term.This analysis prospectively followed 370 cases of PPHT. Automated office BP measurements (AOBPM), 24-hour ambulatory BP measurements (24ABPM), TIS and Kidney Disease Improving Global Outcomes (KDIGO) > A2 levels of albumin to creatinine ratio (ACR) were measured at 3 (V3) and 12 (V12) months postpartum. Outcomes were percentage of participants with non-hypertensive AOBPM and awake 24ABPM, whitecoat, and masked hypertension, and an A2 ACR at V3 and V12. The Basel-PPHT cohort consisted of 11.9% (n = 44) chronic hypertension, 31.9% (n = 118) gestational hypertension, 55.4% (n = 205) PE, eclampsia or HELLP, and 18.4% (n = 68) de novo PPHT. Antihypertensive medication was prescribed at baseline, V3 and V12 in 85.4% (n = 316), 19.2% (n = 46), and 20% (n = 21). At V12, 9.3% (n = 5) with PE, eclampsia, and HELLP vs 31.4% (n = 16) of the remaining cohort required antihypertensive medication, p = 0.005. Non-hypertensive BP without medication was seen at V3 and V12 in 47.9% (n = 103) and 62.4% (n = 63), respectively. Albuminuria at baseline, V3 and V12 was 84.9% (n = 124), 29.9% (n = 63), and 16.9% (n = 14) respectively. The Basel-PPHT registry identified undertreatment and persistent albuminuria, despite structured management. Importantly, those without preeclampsia also required stricter controls. Therefore, rigorous follow-ups are crucial for enhancing cardiovascular and renal outcomes in this population.

Persistent hypertension among postpartum women with comorbid HIV and preeclampsia in Zambia

BACKGROUND

Persistent hypertension is common after preeclampsia and is causally tied to later cardiovascular risks. This study examined whether being HIV-infected and on antiretroviral therapy (ART) is associated with persistent postpartum hypertension among women diagnosed with preeclampsia.

METHODS

We conducted a six-month prospective cohort study at Kanyama and Women and Newborn hospitals from January 01, 2022, to June 30, 2023, among 190 women diagnosed with preeclampsia (59 HIV-positive, 131 HIV-negative). Sociodemographic and clinical characteristics were collected at delivery, six weeks, three months and six months after giving birth. Persistent hypertension was diagnosed if a participant presented with elevated blood pressure ≥140mmHg and/or diastolic blood pressure ≥90mmHg and/or taking medication for hypertension at the study visit. We used a generalized estimating equation to describe the relationship between treated HIV and persistent hypertension six months following delivery.

RESULTS

We retained 136 participants (71.6%) to six months postpartum, at a median age of 30 years. Overall, persistent hypertension at six weeks, three months, and six months postpartum was common (37.4%, 17.1% and 16.9%, respectively). Six-week postpartum prevalence was higher in the HIV group than HIV-negative group (54.6% vs 28.8%, p<0.001), with no measurable difference at three months (24.3% vs 13.2%, p = 0.145) or six months (18.2% vs 16.3%, p = 0.787). Multivariable analysis demonstrates higher odds (adjusted odds ratio [aOR] = 1.68, 95% CI: 1.09-2.60) of persistent hypertension among the HIV+treatment group than HIV-negative counterparts after accounting for age, body mass index and time since delivery.

CONCLUSION

We demonstrate an elevated risk of persistent hypertension among postpartum women with comorbid preeclampsia and treated HIV. Peripartum patients in HIV-endemic settings may benefit from timely detection of hypertension and treatment interventions to improve health outcomes.

Prevalence of persistent hypertension following pregnancy complicated by hypertensive disorders in low- and middle-income countries: a systematic review

Background

Hypertensive disorders of pregnancy can lead to persistent hypertension (pHTN) in the months and even years following delivery. However, its prevalence in low- and middle-income countries (LMICs) is not well characterized.

Objective

To synthesize available evidence on the pHTN prevalence following a pregnancy complicated by hypertensive disorders of pregnancy in LMICs.

Search strategy

PubMed, CINAHL Plus, Global Health (EBSCOhost), and Scopus from inception through a search date of July 12, 2022, and updated on January 2, 2024.

Selection criteria

Cross-sectional studies and cohort studies reporting pHTN prevalence were eligible.

Data collection and analysis

We conducted a narrative synthesis of data and categorized reported prevalence time points into several broader categories. We used the Newcastle-Ottawa checklist to assess the risk of bias. The protocol is registered in PROSPERO (CRD42022345739).

Results

We reviewed 1,584 abstracts and identified 22 studies that reported pHTN between 2000 and 2023 from 14 LMICs. The overall prevalence of pHTN ranged between 6.9% and 62.2%, with the highest prevalence noted within African studies and the lowest in South American studies. Estimates at different follow-up periods postpartum were 6.9%-42.9% at six weeks, 34.0%-62.2% at three months, 14.8%-62.2% at six months, 12.7%-61.2% at 12 months, and 7.5%-31.8% at more than 12 months. The quality score of the selected studies ranged from 50% to 100%.

Conclusions

The extant literature reports a high prevalence of pHTN in LMICs following a pregnancy complicated by hypertensive disorders. To reduce long-term complications of pHTN, programs should emphasize early screening and linkages to long-term care for at-risk women.

Systematic Review Registration

https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=345739, PROSPERO (CRD42022345739).

The Risk of Persistent Hypertension and Chronic Kidney Disease in Early- and Late-Onset Preeclampsia: A Report From Developing Country

BACKGROUND AND OBJECTIVE

Preeclampsia (PE) has been disproportionately prevalent in developing countries and constitutes a leading cause of maternal mortality, and also has long-term impacts, including renal consequences. This study aimed to explore the risk of persistent hypertension and kidney failure in early-onset PE (EOP) and late-onset PE (LOP) in the five years after delivery.

METHODS

This retrospective cohort study included women with a prior history of severe PE or normotensive pregnancy admitted to tertiary hospitals in Indonesia. The blood pressure, body mass index (BMI), urea, creatinine serum, and protein urine were analyzed, and the risk of chronic kidney disease (CKD) after five years was performed using the Kidney Disease Improvement Global Outcomes (KDIGO) classification.

RESULTS

Twenty-seven EOP, 35 LOP, and 30 normotensive cases were included. Mean blood pressure after five years was recorded as 115.6 ± 14.25 mmHg in the normotensive group, 131.82 ± 19.34 mmHg in the LOP group, and 154.96 ± 23.48 mmHg in the EOP group. According to the KDIGO classification, the normotensive group had an average 10% risk of CKD, but severe PE had a risk of CKD greater than 90%. In the severe PE group, the risk of CKD was 20.94 times higher compared to normotensive women (OR 20.94; 95% CI 2.67-163.72, p = 0.004). The risk of CKD in the EOP group was 6.75 times higher than in the LOP group (OR 6.75; 95% CI 2.19-20.76, p = 0.001), whereas persistent hypertension in the EOP group was 5.78 times higher than in the LOP group (OR 5.78; 95% CI 1.91-17.395, p = 0.002).

CONCLUSIONS

PE women have a higher risk of CKD than normotensive women. Women with a history of EOP are more likely to develop persistent hypertension and CKD than women with a prior LOP history.

Observational database study on preeclampsia and postpartum medical care up to 7.5 years after birth

Preeclampsia is associated with a substantially increased long-term risk for cardiovascular, cerebrovascular and renal disease. It remains unclear whether and to which extent specialized medical postpartum care is sought. We aimed to assess current utilization of postpartum primary and specialized care and medication prescription behavior in women who experienced preeclampsia. This retrospective observational study based on statutory claims data included 193,205 women with 258,344 singleton live births between 2010 and 2017 in Southern Germany. Postpartum care was evaluated by analyzing and comparing the frequency of medical consultations in primary and specialized care and prescriptions for antihypertensive medication among women with and without preeclampsia up to 7.5 years after delivery. Gynecologists and general practitioners were the main health care providers for all women. Although specialized postpartum care was sought by more women after preeclampsia, the effect size indices revealed no considerable association between a history of preeclampsia and the utilization of specialized outpatient aftercare (e.g. 2% vs. 0.6% of patients with and without preeclampsia who consulted a nephrologist during the first year postpartum, r = 0.042). Preeclampsia was associated with an increased risk to take any antihypertensive medication after delivery (HR 2.7 [2.6; 2.8]). Postpartum referral to specialized outpatient care and quarterly prescriptions of antihypertensives following preeclampsia failed to match the early and rapidly increased incidence and risk of hypertension. These data highlight the missed opportunity to implement a reasonable follow-up strategy and prevention management in order to achieve long-term clinical benefits.

Adherence to Guidelines in Postpartum Management of Hypertensive Disorders in Pregnancy in Tertiary Health Facilities in Nigeria: A Multi-centre Study

Hypertensive disorders in pregnancy (HDPs) are a leading cause of maternal morbidity and mortality. Available guidelines for their postpartum management are expected to be optimally utilized. This study aimed to determine adherence to guidelines in selected Nigerian tertiary hospitals. It was nested in a cohort of women with HDPs who delivered in eight facilities between October 2017 and June 2018. Nine weeks after delivery, their cases were evaluated on prespecified indicators and supplemented with interviews. The level of adherence to the guidelines was determined using descriptive analyses, including frequencies, percentages, means, and standard deviations, as well as charts. Of the 366 participants, 33 (9%), 75 (20%), 200 (55%), and 58 (16%) had chronic hypertension, gestational hypertension, preeclampsia, and eclampsia, respectively. Only about a third had their blood pressure measured between postpartum days three and five. Similarly, a third of those with persistent hypertension (≥140/90 mmHg) were not on antihypertensive medications within the first week postpartum. In addition, 37% and 42% of participants were not counseled on contraceptives and early subsequent antenatal visits, respectively. Among those with preeclampsia/eclampsia, 93% were not offered postpartum screening for thromboprophylaxis. Although all women with preeclampsia/eclampsia remained hypertensive two weeks after discharge, only 24% had medical reviews. Overall, only 58% and 44% of indicators were adhered to among all HDPs and preeclampsia/eclampsia-specific indicators, respectively. Level of adherence to guidelines on postpartum management of HDPs in Nigerian tertiary hospitals is poor. It is recommended that institutionalization of guidelines be prioritized and linked to the entire continuum from preconception through longer term postpartum care.

Short term cardiovascular risk in normotensive women after hypertensive pregnancy

INTRODUCTION

Hypertensive pregnancy was recognized as a risk factor of cardiovascular events. The aim of our study was to evaluate the short-term cardiovascular risk in normotensive females with previous hypertensive pregnancy.

MATERIAL AND METHODS

A prospective cohort study was conducted on 50 females with previous normotensive pregnancy and 50 females with previous hypertensive pregnancy. All patients were re-evaluated three months postpartum to be sure that they became normotensive. One year postpartum, all patients were subjected to renal function tests, urinary albumin/creatinine ratio for microalbuminuria, glycated hemoglobin, complete lipid profile, echocardiographic assessment of left ventricular mass index and carotid duplex for measurement of intimal-medial thickness, presence of carotid plaques and stenosis.

RESULTS

No significant difference between both groups regarding blood pressure level three months postpartum. No significant difference between both groups regarding serum creatinine. Patients with previous hypertensive pregnancy group had significantly higher microalbuminuria compared with previous normotensive pregnancy group (p=0.000). Serum LDL and triglycerides were significantly higher however HDL was significantly lower in those with previous hypertensive pregnancy, however all lipid profile measures were within normal range. No significant difference between both groups regarding left ventricular mass index and carotid intima-media thickness. No evidence of carotid plaques or stenosis in both groups.

CONCLUSIONS

Previous hypertensive pregnancy was associated with increased risk of microalbuminuria at short term level even after normalization of blood pressure post-partum. Longer period of follow up is required to establish the potential cardiovascular risk in these patients.

High blood pressure in pregnancy, DNA methylation, and later blood pressure in African American women enrolled in the InterGEN Study

BACKGROUND

Few studies have examined the effects of high blood pressure (BP) in pregnancy, preeclampsia, or eclampsia on later BP, and the epigenetics of this phenomenon is similarly poorly understood, especially among African Americans. The purpose of this study was to examine the association between high BP in pregnancy, epigenomics, and later BP in African American women in the InterGEN Study (n = 250).

METHODS

In cross-sectional analyses, regression and linear mixed-effects models were employed to examine the effects of high BP in pregnancy on: (a) epigenetic associations (DNA methylation) and (b) BP 3-5 years after birth. The 850K Illumina EPIC BeadChip was used for evaluating epigenome-wide DNA methylation. High BP in pregnancy, preeclampsia, or eclampsia was self-reported by women, and BP was measured 3-5 years after birth, per JNC-7 guidelines. DNA methylation and clinical BP were the main outcomes.

RESULTS

Mean age of enrolled women was 31.2 years, 21.8% were smokers, 58% had some college or higher education, 46.6% reported an annual income <$15 000, and 13.6% reported high BP in pregnancy. After adjustment for obesity, smoking, and age, women with a history of high BP in pregnancy had significantly higher BP than those who did not report this complication (5.39 ± 2.4 mm Hg, P = .030). Epigenome-wide analysis revealed no significant sites after multiple testing correction.

CONCLUSIONS

We observed a small, but clinically significant, increase in BP in women who reported high BP in pregnancy 3-5 years after that pregnancy. Future studies with larger sample sizes should examine epigenetic contributions to this finding.