Haemorrhagic Strokes in Pregnancy and Puerperium

Intracranial Arteriovenous Malformations During Pregnancy and Puerperium-A Retrospective Nationwide Population-Based Cohort Study

BACKGROUND AND OBJECTIVES

The knowledge about the management of patients with brain arteriovenous malformations (AVM) during pregnancy is limited, owing partly to insufficient evidence about the outcomes of newborns. This study aims to explore symptomatic AVMs and their outcomes during pregnancy, delivery, and the postpartum period.

METHODS

We conducted a retrospective analysis by combining patients with symptomatic AVM from a nationwide population-based cohort of all women with a pregnancy resulting in delivery during 1987 to 2016 (n = 1 773 728 deliveries) and our AVM database (n = 805, 1942-2014). Cerebrovascular events during pregnancy were identified through International Classification of Diseases-9, International Classification of Diseases-10, or surgical procedure codes from the Hospital Discharge and Medical Birth Registers. Our analysis focused on treatment characteristics and outcomes of patients with AVM hemorrhage or symptomatic AVM during pregnancy, delivery, or puerperium.

RESULTS

A total of 28 women with symptomatic AVMs during pregnancy, delivery, or postpartum period were followed for an average of 12.8 years (SD = 15.5) after admission. Among them, 21 (75%) experienced AVM hemorrhages during pregnancy, puerperium, or delivery. The mean age of patients was 28.9 years (SD = 5.5). Hemorrhages occurred predominantly during the second (n = 9, 43% of all ruptures) or the third trimester (n = 5, 24%). Two AVM ruptures occurred during labor. Treatment for AVM took place during pregnancy (n = 7, 25%) or puerperium (n = 3, 14%) in 10 patients (35.7%). Only 5 mothers (17.8%) had not been previously pregnant. There was no significant difference in mean Apgar scores between those with AVM hemorrhage (8.3) and those without (8.4).

CONCLUSION

Most mothers in the study had prior pregnancies, suggesting a potentially weaker association between AVM rupture and pregnancy compared to previous reports. Notably, 2 AVM ruptures occurred during spontaneous vaginal deliveries. Outcomes were generally favorable in both mothers and infants. More research is needed to refine our understanding of the optimal timing for invasive treatment during pregnancy.

Predictors of Mortality and Functional Outcome in Pregnancy and Puerperium-Related Cerebral Venous Thrombosis

INTRODUCTION

Cerebral venous thrombosis (CVT) associated with pregnancy and puerperium has long been recognized, with poor information in terms of functional outcomes. Our objective was to analyze risk factors, clinical, imaging, and laboratory variables to predict functional outcome and death in this population.

METHODS

CVT registries from three referral centers from Pakistan, Turkey, and Mexico, recruiting prospective cases, were combined for CVT associated with pregnancy or puerperium. Datasets and variables were standardized. Demographic characteristics, presentation, risk factors, and functional outcomes in pregnancy/puerperium-related CVT were analyzed. Binary logistic regression was used to assess predictors of outcome. The main outcome was modified Rankin score >2 at 30 days and mortality at 30 days.

RESULTS

Five hundred fifty-three cases (median age 28 years [IQR 23-34]) of CVT associated with pregnancy and puerperium were included; 439 cases (79.4%) happened in the puerperium and 20.6% during pregnancy (53.5% occurred during the first trimester). Anemia (36.7%) and dehydration (22.9%) were the commonest obstetric risk factors identified. Predictors of poor outcome (mRS >2) were encephalopathy (OR 12.8, p < 0.001), cases from Mexican origin (OR 3.1, p = 0.004), fever/puerperal infection (OR 2.7, p = 0.02), and anemia (OR 2.2, p = 0.01). Cases from Mexican origin (OR 12.0, p = 0.003) and Encephalopathy (OR 7.7, p < 0.001), presented with the highest mortality association in the final adjusted model.

DISCUSSION/CONCLUSION

In CVT associated with pregnancy and puerperium, encephalopathy, fever/puerperal infection, and anemia are associated with bad functional outcomes, meanwhile encephalopathy and cases from Mexican origin with higher mortality in the acute (30-days) of CVT onset. Anemia and infection are potential reversible predictors of poor outcome that clinicians should be aware of in order to prevent poor outcomes in these patients.

Risk of First Hemorrhage of Brain Arteriovenous Malformations During Pregnancy: A Systematic Review of the Literature

BACKGROUND

Recommendations on the management of brain arteriovenous malformations (bAVM) with respect to pregnancy are based upon conflicting literature.

OBJECTIVE

To systematically review the reported risk and annualized rate of first intracranial hemorrhage (ICH) from bAVM during pregnancy and puerperium.

METHODS

MEDLINE, EMBASE, and Scopus databases were searched for relevant articles in English published before April 2018. Studies providing a quantitative risk of ICH in bAVM during pregnancy were eligible.

RESULTS

From 7 initially eligible studies, 3 studies met the criteria for providing quantitative risk of first ICH bAVM during pregnancy. Data from 47 bAVM ICH during pregnancy across 4 cohorts were extracted for analysis. Due to differences in methodology and definitions of exposure period, it was not appropriate to combine the cases. The annualized risk of first ICH during pregnancy for these 4 cohorts was 3.0% (95% confidence interval [CI]: 1.7-5.2%); 3.5% (95% CI: 2.4-4.5%); 8.6% (95% CI: 1.8-25%); and 30% (95% CI: 18-49%). Only the last result from the last cohort could be considered significantly increased in comparison with the nonpregnant period (relative rate 6.8, 95% CI: 3.6-13). The limited number of eligible studies and variability in results highlighted the need for enhanced rigor of future research.

CONCLUSION

There is no conclusive evidence of an increased risk of first hemorrhage during pregnancy from bAVM. Because advice to women with bAVM may influence the management of pregnancy or bAVM with significant consequences, we believe that a retrospective multicenter, case crossover study is urgently required.

Optic pathway-hypothalamic glioma hemorrhage: a series of 9 patients and review of the literature

OBJECTIVEHemorrhage (also known as apoplexy) in optic pathway gliomas (OPGs) is rare. Because of the variable presentations and low incidence of OPG hemorrhages, little is known about their clinical course and the best treatment options. The aim of this work was to review risk factors, clinical course, and treatment strategies of optic glioma hemorrhages in the largest possible number of cases.METHODSA total of 34 patients were analyzed. Nine new cases were collected, and 25 were identified in the literature. Data regarding demographics, radiological and histological features, treatment, and outcome were retrospectively reviewed.RESULTSThe majority of patients were younger than 20 years. Only 3 patients were known to have neurofibromatosis. The histopathological diagnosis was pilocytic astrocytoma in the majority of cases. Five patients had intraorbital hemorrhages, whereas 29 patients had intracranial hemorrhage; the majority of intracranial bleeds were treated surgically. Six patients, all with intracranial hemorrhage, died due to recurrent bleeding, hydrocephalus, or surgical complications. No clear risk factors could be identified.CONCLUSIONSIntracerebral OPG hemorrhages have a fatal outcome in 20% of cases. Age, hormonal status, neurofibromatosis involvement, and histopathological diagnosis have been suggested as risk factors for hemorrhage, but this cannot be reliably established from the present series. The goals of surgery should be patient survival and prevention of further neurological and ophthalmological deterioration.

Pregnancy-Associated Stroke

Cerebrovascular accident, or stroke, is the fourth leading cause of death for all women and the eighth leading cause of pregnancy-associated death. The physiologic changes of pregnancy increase the risk of cerebrovascular accident for women. With current incidence rates, a facility with 3300 births per year can anticipate caring for one woman with a pregnancy-related stroke at least every 2 years. All maternity care providers must be able to assess women experiencing stroke-like symptoms and initiate timely care to mitigate brain tissue damage, decrease long-term morbidity, and prevent mortality. The 2 main types of stroke, ischemic and hemorrhagic, have similar presenting symptoms but very different pathophysiology and treatment. This article reviews assessment and initial treatment of pregnant and postpartum women experiencing stroke and provides guidance for subsequent maternity and primary care to assist front-line perinatal care providers who may be the first to treat affected women or may resume primary care after diagnosis.

Stroke in women - from evidence to inequalities

Stroke is the second largest cause of disability-adjusted life-years lost worldwide. The prevalence of stroke in women is predicted to rise rapidly, owing to the increasing average age of the global female population. Vascular risk factors differ between women and men in terms of prevalence, and evidence increasingly supports the clinical importance of sex differences in stroke. The influence of some risk factors for stroke - including diabetes mellitus and atrial fibrillation - are stronger in women, and hypertensive disorders of pregnancy also affect the risk of stroke decades after pregnancy. However, in an era of evidence-based medicine, women are notably under-represented in clinical trials - despite governmental actions highlighting the need to include both men and women in clinical trials - resulting in a reduced generalizability of study results to women. The aim of this Review is to highlight new insights into specificities of stroke in women, to plan future research priorities, and to influence public health policies to decrease the worldwide burden of stroke in women.

The incidence of first stroke in and around pregnancy: A population-based cohort study from Sweden

Introduction

Research has suggested that delivery is associated with an increased risk of stroke in women; however, there is a lack of contemporary estimates on the incidence of stroke in and after pregnancy compared with the baseline risk in women of childbearing age in Sweden.

Patients and methods

All women aged 15-49 years with live births/stillbirths in 1992-2011 were identified from the Swedish Medical Birth Registry linked with the National Patient Registry. First stroke during the study period was identified. Incidence rates per 100,000 person-years and adjusted incidence rate ratios (IRRs) were calculated for antepartum, peripartum and early and late postpartum periods, compared with all other available follow-up time (time before pregnancy and after postpartum) using Poisson regression adjusted for maternal age, education attainment and calendar time.

Results

Of 1,124,541 women, 3094 had a first incident stroke (331 occurred during pregnancy or first 12 weeks postpartum), about half having ischaemic stroke. The incidence was 15.0 per 100,000 person-years (95% confidence interval 14.5-15.6) in non-pregnant time. The incidence was lower antepartum (7.3/100,000 person-years, 6.0-8.9; adjusted IRR = 0.7, 0.5-0.8) but higher peripartum (314.4/100,000 person-years, 247.5-399.5; adjusted IRR = 27.3, 21.4-34.9) and early postpartum (64.0/100,000 person-years, 54.1-75.7; adjusted IRR = 5.5, 4.6-6.6). The increased risk in peripartum was more evident for intracerebral haemorrhage than other types of stroke.

Conclusion

Overall risk of stroke was low in women of childbearing age, but stroke risk peaks in the peripartum and early postpartum periods. Future work should address factors that contribute to this increased risk in order to develop approaches to attenuate risk.

Progress in translational research on intracerebral hemorrhage: is there an end in sight?

Intracerebral hemorrhage (ICH) is a common and often fatal stroke subtype for which specific therapies and treatments remain elusive. To address this, many recent experimental and translational studies of ICH have been conducted, and these have led to several ongoing clinical trials. This review focuses on the progress of translational studies of ICH including those of the underlying causes and natural history of ICH, animal models of the condition, and effects of ICH on the immune and cardiac systems, among others. Current and potential clinical trials also are discussed for both ICH alone and with intraventricular extension.