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Fang M, Wang J, Wang Z, Chen Y, Xu W, Tao C, Ma L, You C, Hu X, Xia F. Impact of hypertensive disorders of pregnancy on short- and long-term outcomes of pregnancy-associated hemorrhagic stroke. Front Neurol 2023; 14:1097183. [PMID: 37006493 PMCID: PMC10060960 DOI: 10.3389/fneur.2023.1097183] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 02/17/2023] [Indexed: 03/18/2023] Open
Abstract
Background and purposeThough hypertension disorders of pregnancy (HDP) are recognized as independent pregnancy-associated stroke risk factors, few studies have considered their impact on stroke prognosis. Therefore, we intended to evaluate the impact of HDP on short- and long-term outcomes of pregnancy-associated hemorrhagic stroke (HS).MethodsWe conducted a retrospective analysis of patients admitted to our hospital from May 2009 to December 2021 with a diagnosis of pregnancy-associated HS. After dividing patients into two groups by the presence of a diagnosis of HDP or not, the short- (at the time of discharge) and long-term (after discharge follow-up) outcomes were compared by mRS (modified Rankin Scale) scores, and poor functional outcome defined as mRS > 2. Adjusted odds ratios (OR) and 95% confidence intervals (CI) were reported.ResultsTwenty-two HDP and 72 non-HDP pregnancy-associated HS patients were enrolled and follow-up after 4.7 ± 3.6 years. There was no significant difference between the two groups regarding short-term outcomes, but patients with HDP were more likely to reach poor functional outcomes at long-term follow-up (aOR = 4.47, 95% CI = 1.28–15.67, p = 0.019).ConclusionsIn this retrospective study, women with hypertension disorders of pregnancy did not show worse short-term outcomes of pregnancy-associated hemorrhagic stroke compared to those without but had poorer long-term functional outcomes. This underlines the importance of prevention, recognition, and treatment of hypertension disorders in these women.
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Affiliation(s)
- Mei Fang
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Jiayan Wang
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Zexu Wang
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Yuqi Chen
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, China
| | - Wei Xu
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chuanyuan Tao
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Lu Ma
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Chao You
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Xin Hu
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- *Correspondence: Xin Hu
| | - Fan Xia
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, Sichuan, China
- Fan Xia
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Dines V, Suvakov S, Kattah A, Vermunt J, Narang K, Jayachandran M, Abou Hassan C, Norby AM, Garovic VD. Preeclampsia and the Kidney: Pathophysiology and Clinical Implications. Compr Physiol 2023; 13:4231-4267. [PMID: 36715282 DOI: 10.1002/cphy.c210051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Preeclampsia and other hypertensive disorders of pregnancy are major contributors to maternal morbidity and mortality worldwide. This group of disorders includes chronic hypertension, gestational hypertension, preeclampsia, preeclampsia superimposed on chronic hypertension, and eclampsia. The body undergoes important physiological changes during pregnancy to allow for normal placental and fetal development. Several mechanisms have been proposed that may lead to preeclampsia, including abnormal placentation and placental hypoxia, impaired angiogenesis, excessive pro-inflammatory response, immune system imbalance, abnormalities of cellular senescence, alterations in regulation and activity of angiotensin II, and oxidative stress, ultimately resulting in upregulation of multiple mediators of endothelial cell dysfunction leading to maternal disease. The clinical implications of preeclampsia are significant as there are important short-term and long-term health consequences for those affected. Preeclampsia leads to increased risk of preterm delivery and increased morbidity and mortality of both the developing fetus and mother. Preeclampsia also commonly leads to acute kidney injury, and women who experience preeclampsia or another hypertensive disorder of pregnancy are at increased lifetime risk of chronic kidney disease and cardiovascular disease. An understanding of normal pregnancy physiology and the pathophysiology of preeclampsia is essential to develop novel treatment approaches and manage patients with preeclampsia and hypertensive disorders of pregnancy. © 2023 American Physiological Society. Compr Physiol 13:4231-4267, 2023.
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Affiliation(s)
- Virginia Dines
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Sonja Suvakov
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Andrea Kattah
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Jane Vermunt
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Kavita Narang
- Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Coline Abou Hassan
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Alexander M Norby
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA
| | - Vesna D Garovic
- Division of Nephrology and Hypertension, Mayo Clinic, Rochester, Minnesota, USA.,Department of Obstetrics and Gynecology, Mayo Clinic, Rochester, Minnesota, USA
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Ozdemir ME, Demirci O, Ozturkmen HA, Ulusoy NB, Ohanoglu K, Cilingir IU. What Is the Role of the Maternal Ophthalmic and Cervical Internal Carotid Arteries in Predicting Maternal Adverse Outcomes in Preeclampsia? JOURNAL OF ULTRASOUND IN MEDICINE : OFFICIAL JOURNAL OF THE AMERICAN INSTITUTE OF ULTRASOUND IN MEDICINE 2020; 39:1527-1535. [PMID: 32049383 DOI: 10.1002/jum.15241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 01/22/2020] [Accepted: 01/27/2020] [Indexed: 05/27/2023]
Abstract
OBJECTIVES We aimed to investigate the efficacy of maternal ophthalmic artery (OA) and cervical internal carotid artery (CICA) in predicting adverse maternal outcomes and gestational age at birth in preeclampsia (PE). METHODS The study was performed at the Zeynep Kamil Women and Children's Diseases Training and Research Hospital. Measurements were made in 2 groups consisting of 50 pregnant women with PE and 50 healthy pregnant women. The peak systolic velocity (PSV), end-diastolic velocity, PI, RI, first diastolic peak velocity, systolic/diastolic (S/D) ratio, and peak ratio of the maternal OA were measured by a transorbital Doppler ultrasound (US) scan. The PSV, end-diastolic velocity, PI, RI, and S/D ratio of the CICA were measured. The differences of Doppler indices between groups with P < .05 were considered statistically significant. Cutoff values were calculated, which could be used to predict adverse maternal outcomes and gestational age at birth. RESULTS The RI and PI values of the OA were lower, and the first diastolic peak velocity, PSV, and peak ratio values were higher among the PE group. The RI and S/D values of the CICA were significantly lower in the PE group compared to the healthy group. The OA RI was determined to be the strongest US variable in predicting adverse maternal outcomes and gestational age at birth, with a cutoff value of 0.72, 76% sensitivity, and 76% specificity. CONCLUSIONS Maternal OA Doppler indices can be used as US markers to predict adverse maternal outcomes.
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Affiliation(s)
- Mucize Eric Ozdemir
- Departments of Perinatology, Health Science University, Zeynep Kamil Women and Children's Diseases Training and Research Hospital, Istanbul, Turkey
| | - Oya Demirci
- Departments of Perinatology, Health Science University, Zeynep Kamil Women and Children's Diseases Training and Research Hospital, Istanbul, Turkey
| | - Hatice Akay Ozturkmen
- Department of Radiology, Health Science University, Zeynep Kamil Women and Children's Diseases Training and Research Hospital, Istanbul, Turkey
| | - Nuray Bakal Ulusoy
- Department of Radiology, Health Science University, Zeynep Kamil Women and Children's Diseases Training and Research Hospital, Istanbul, Turkey
| | - Karolin Ohanoglu
- Health Science University, Istanbul Training and Research Hospital, Istanbul, Turkey
| | - Isil Uzun Cilingir
- Health Science University, Istanbul Training and Research Hospital, Istanbul, Turkey
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Cerebral Blood Flow Regulation in Pregnancy, Hypertension, and Hypertensive Disorders of Pregnancy. Brain Sci 2019; 9:brainsci9090224. [PMID: 31487961 PMCID: PMC6769869 DOI: 10.3390/brainsci9090224] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/26/2019] [Accepted: 09/03/2019] [Indexed: 01/12/2023] Open
Abstract
The regulation of cerebral blood flow (CBF) allows for the metabolic demands of the brain to be met and for normal brain function including cognition (learning and memory). Regulation of CBF ensures relatively constant blood flow to the brain despite changes in systemic blood pressure, protecting the fragile micro-vessels from damage. CBF regulation is altered in pregnancy and is further altered by hypertension and hypertensive disorders of pregnancy including preeclampsia. The mechanisms contributing to changes in CBF in normal pregnancy, hypertension, and preeclampsia have not been fully elucidated. This review summarizes what is known about changes in CBF regulation during pregnancy, hypertension, and preeclampsia.
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Affiliation(s)
- Eliza C Miller
- From the Department of Neurology, Division of Stroke and Cerebrovascular Disease, Columbia University Irving Medical Center, New York, NY
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6
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Evers KS, Atkinson A, Barro C, Fisch U, Pfister M, Huhn EA, Lapaire O, Kuhle J, Wellmann S. Neurofilament as Neuronal Injury Blood Marker in Preeclampsia. Hypertension 2018; 71:1178-1184. [PMID: 29686016 DOI: 10.1161/hypertensionaha.117.10314] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 10/02/2017] [Accepted: 03/28/2018] [Indexed: 12/13/2022]
Abstract
Preeclampsia has been shown to be associated with changes in cerebral structure and cognitive function later in life. Nf (neurofilaments) are specific scaffolding proteins of neurons, and their quantification in serum has been proposed as a biomarker for neuroaxonal injury. We performed a prospective, longitudinal, single-center study at the University Hospital of Basel to determine serum Nf concentrations in pregnant women with singleton pregnancies and with high risk of preeclampsia or with early signs of preeclampsia. Enrollment started at 21 weeks of gestation, followed up with multiple visits until delivery. Sixty out of 197 women developed preeclampsia (30.5%). NfL (Nf light chain) was measured with a highly sensitive single molecule array (Simoa) assay, in addition to the established preeclampsia markers sFlt-1 (soluble fms-like tyrosine kinase-1) and PlGF (placental growth factor). The most important independent predictors of NfL were maternal age, number of pregnancies, and proteinuria. NfL levels increased during pregnancy and were significantly higher in women developing preeclampsia. The discriminatory accuracy of NfL, PlGF, and sFlt-1 in receiver operating characteristic curves analysis (area under the curve) of the overall group was 0.68, 0.81, and 0.84, respectively, and in women older than 36 years 0.7, 0.62, and 0.79, respectively. We conclude that increased axonal injury serum marker NfL predicts preeclampsia particularly in older women, with an accuracy similar to the established angiogenic factors. NfL may serve as an early indicator of preeclampsia-induced changes in cerebral structure and may help to stratify disease management.
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Affiliation(s)
| | - Andrew Atkinson
- and Division of Paediatric Pharmacology and Pharmacometrics (A.A., M.P.).,University of Basel Children's Hospital (UKBB), Switzerland; Department of Infectious Diseases, University Hospital Bern, Switzerland (A.A.)
| | - Christian Barro
- and Neurologic Clinic and Policlinic, Departments of Medicine, Biomedicine and Clinical Research (C.B., U.F., J.K.)
| | - Urs Fisch
- and Neurologic Clinic and Policlinic, Departments of Medicine, Biomedicine and Clinical Research (C.B., U.F., J.K.)
| | - Marc Pfister
- and Division of Paediatric Pharmacology and Pharmacometrics (A.A., M.P.)
| | - Evelyn A Huhn
- and Division of Obstetrics and Gynecology (E.A.H., O.L.) University Hospital Basel, University of Basel, Switzerland
| | - Olav Lapaire
- and Division of Obstetrics and Gynecology (E.A.H., O.L.) University Hospital Basel, University of Basel, Switzerland
| | - Jens Kuhle
- and Neurologic Clinic and Policlinic, Departments of Medicine, Biomedicine and Clinical Research (C.B., U.F., J.K.)
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McDermott M, Miller EC, Rundek T, Hurn PD, Bushnell C. Preeclampsia: Association With Posterior Reversible Encephalopathy Syndrome and Stroke. Stroke 2018; 49:524-530. [PMID: 29438078 PMCID: PMC5828994 DOI: 10.1161/strokeaha.117.018416] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/04/2017] [Accepted: 11/07/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Mollie McDermott
- From the Department of Neurology, University of Michigan, Ann Arbor (M.M.); Division of Stroke and Cerebrovascular Disease, Department of Neurology, Columbia University, New York, NY, (E.C.M.); Department of Neurology, University of Miami Miller School of Medicine, FL (T.R.); University of Michigan School of Nursing, Ann Arbor (P.D.H.); and Department of Neurology, Wake Forest School of Medicine, Winston-Salem, NC (C.D.B.).
| | - Eliza C Miller
- Columbia University Department of Neurology, Division of Stroke and Cerebrovascular Disease
| | - Tatjana Rundek
- Department of Neurology, University of Miami Miller School of Medicine
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Miller EC, Gatollari HJ, Too G, Boehme AK, Leffert L, Marshall RS, Elkind MS, Willey JZ. Risk Factors for Pregnancy-Associated Stroke in Women With Preeclampsia. Stroke 2017; 48:1752-1759. [PMID: 28546324 PMCID: PMC5539968 DOI: 10.1161/strokeaha.117.017374] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 04/14/2017] [Accepted: 04/27/2017] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Preeclampsia affects 3% to 8% of pregnancies and increases risk of pregnancy-associated stroke (PAS). Data are limited on which women with preeclampsia are at highest risk for PAS. METHODS Using billing data from the 2003 to 2012 New York State Department of Health inpatient database, we matched women with preeclampsia and PAS 1:3 to preeclamptic controls based on age and race/ethnicity. Pre-defined PAS risk factors included pregnancy complications, infection present on admission, vascular risk factors, prothrombotic states, and coagulopathies. We constructed multivariable conditional logistic regression models to calculate the odds ratios (ORs) and 95% confidence intervals (95% CIs) for independent risk factors for PAS. RESULTS Among women aged 12 to 55 years admitted to New York State hospitals for any reason during the study period (n=3 373 114), 88 857 had preeclampsia, and 197 of whom (0.2%) had PAS. In multivariable analysis, women with preeclampsia and stroke were more likely than controls to have severe preeclampsia or eclampsia (OR, 7.2; 95% confidence interval [CI], 4.6-11.3), infections present on admission (OR, 3.0; 95% CI, 1.6-5.8), prothrombotic states (OR, 3.5; 95% CI, 1.3-9.2), coagulopathies (OR, 3.1; 95% CI, 1.3-7.1), or chronic hypertension (OR, 3.2; 95% CI, 1.8-5.5). Additional analyses matched and stratified by severity of preeclampsia confirmed these results. CONCLUSIONS Infections, chronic hypertension, coagulopathies, and underlying prothrombotic conditions increase PAS risk in women with preeclampsia. These women may warrant closer monitoring.
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Affiliation(s)
- Eliza C. Miller
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York
| | - Hajere J. Gatollari
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York
| | - Gloria Too
- Department of Obstetrics and Gynecology, Columbia University, New York
| | - Amelia K. Boehme
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York,Department of Epidemiology, Mailman School of Public Health, Columbia University, New York
| | - Lisa Leffert
- Department of Anesthesia,Critical Care & Pain Medicine, Massachusetts General Hospital, Boston
| | - Randolph S. Marshall
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York
| | - Mitchell S.V. Elkind
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York,Department of Epidemiology, Mailman School of Public Health, Columbia University, New York
| | - Joshua Z. Willey
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York
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Kane SC, Brennecke SP, da Silva Costa F. Ophthalmic artery Doppler analysis: a window into the cerebrovasculature of women with pre-eclampsia. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2017; 49:15-21. [PMID: 27485824 DOI: 10.1002/uog.17209] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 07/22/2016] [Indexed: 05/27/2023]
Affiliation(s)
- S C Kane
- University of Melbourne, Department of Obstetrics and Gynaecology, The Royal Women's Hospital, Parkville, Victoria, Australia
- Pregnancy Research Centre, Department of Maternal Fetal Medicine, The Royal Women's Hospital, Parkville, Victoria, Australia
| | - S P Brennecke
- University of Melbourne, Department of Obstetrics and Gynaecology, The Royal Women's Hospital, Parkville, Victoria, Australia
- Pregnancy Research Centre, Department of Maternal Fetal Medicine, The Royal Women's Hospital, Parkville, Victoria, Australia
| | - F da Silva Costa
- University of Melbourne, Department of Obstetrics and Gynaecology, The Royal Women's Hospital, Parkville, Victoria, Australia
- Perinatal Services, Monash Health, Clayton, Victoria, Australia
- Monash Ultrasound for Women, Clayton, Victoria, Australia
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Li X, Han X, Yang J, Bao J, Di X, Zhang G, Liu H. Magnesium Sulfate Provides Neuroprotection in Eclampsia-Like Seizure Model by Ameliorating Neuroinflammation and Brain Edema. Mol Neurobiol 2016; 54:7938-7948. [PMID: 27878553 DOI: 10.1007/s12035-016-0278-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 10/30/2016] [Indexed: 02/07/2023]
Abstract
Eclampsia is a hypertensive disorder of pregnancy that is defined by the new onset of grand mal seizures on the basis of preeclampsia and a leading cause of maternal and fetal mortality worldwide. Presently, magnesium sulfate (MgSO4) is the most effective treatment, but the mechanism by which MgSO4 prevents eclampsia has yet to be fully elucidated. We previously showed that systemic inflammation decreases the seizure threshold in a rat eclampsia-like model, and MgSO4 treatment can decrease systemic inflammation. Here, we hypothesized that MgSO4 plays a neuroprotective role in eclampsia by reducing neuroinflammation and brain edema. Pregnant Sprague-Dawley rats were given an intraperitoneal injection of pentylenetetrazol following a tail vein injection of lipopolysaccharide to establish the eclampsia-like seizure model. Seizure activity was assessed by behavioral testing. Neuronal loss in the hippocampal CA1 region (CA1) was detected by Nissl staining. Cerebrospinal fluid levels of S100-B and ferritin, indicators of neuroinflammation, were detected by enzyme-linked immunosorbent assay, and ionized calcium binder adapter molecule 1 (Iba-1, a marker for microglia) and glial fibrillary acid protein (GFAP, a marker for astrocytes) expression in the CA1 area was determined by immunofluorescence staining. Brain edema was measured. Our results revealed that MgSO4 effectively attenuated seizure severity and CA1 neuronal loss. In addition, MgSO4 significantly reduced cerebrospinal fluid levels of S100-B and ferritin, Iba-1 and GFAP activation in the CA1 area, and brain edema. Our results indicate that MgSO4 plays a neuroprotective role against eclampsia-like seizure by reducing neuroinflammation and brain edema.
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Affiliation(s)
- Xiaolan Li
- Department of Obstetrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China
| | - Xinjia Han
- Department of Obstetrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China
| | - Jinying Yang
- Department of Obstetrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China
| | - Junjie Bao
- Department of Obstetrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China
| | - Xiaodan Di
- Department of Obstetrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China
| | - Guozheng Zhang
- Department of Obstetrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China
| | - Huishu Liu
- Department of Obstetrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, 9 Jinsui Road, Guangzhou, 510623, China.
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Seizures in the peripartum period: Epidemiology, diagnosis and management. Anaesth Crit Care Pain Med 2016; 35 Suppl 1:S13-S21. [DOI: 10.1016/j.accpm.2016.06.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abstract
Preeclampsia is a hypertensive, multisystem disorder of pregnancy that affects several organ systems, including the maternal brain. Cerebrovascular dysfunction during preeclampsia can lead to cerebral edema, seizures, stroke, and potentially maternal mortality. This review will discuss the effects of preeclampsia on the cerebrovasculature that may adversely affect the maternal brain, including cerebral blood flow (CBF) autoregulation and blood-brain barrier disruption and the resultant clinical outcomes including posterior reversible encephalopathy syndrome (PRES) and maternal stroke. Potential long-term cognitive outcomes of preeclampsia and the role of the cerebrovasculature are also reviewed.
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Affiliation(s)
- Erica Shields Hammer
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Vermont, Burlington, VT, USA,
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13
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Williams KP, Galerneau F, Small M. Transfer function analysis of dynamic cerebral autoregulation in preeclampsia. Pregnancy Hypertens 2015; 5:322-4. [DOI: 10.1016/j.preghy.2015.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 08/21/2015] [Accepted: 09/06/2015] [Indexed: 11/28/2022]
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15
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van den Bogaard B, Immink RV, Westerhof BE, van Montfrans GA, van Lieshout JJ, van den Born BJH. Central versus peripheral blood pressure in malignant hypertension; effects of antihypertensive treatment. Am J Hypertens 2013; 26:574-9. [PMID: 23467212 DOI: 10.1093/ajh/hps075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Sodium nitroprusside (SNP) and labetalol are recommended for the immediate treatment of malignant hypertension. Both are intravenous agents but have different effects on systemic hemodynamics, and may have differential effects on pulse-wave reflection and pulse-pressure amplification, with consequences for peripheral versus central blood pressures (BPs). METHODS We conducted a nonrandomized, open-label study of 8 patients treated with sodium nitroprusside (mean age (±SD), 44±14 years; 6 males; diastolic/systolic BP, 225±22/135±8mm Hg) and 6 patients treated with intravenous labetalol (mean age, 39±15 years; 4 males; systolic/diastolic BP, 232±22/138±17mm Hg) before and after treatment for malignant hypertension, aiming at a 25% reduction in mean arterial pressure. We measured peripheral pressures with an intra-arterial catheter in the radial artery and derived central pressures with a generalized transfer filter. RESULTS Mean arterial pressure was similarly reduced with sodium nitroprusside and labetalol (by 27% and 30%, respectively; P = 0.76). There was a nonsignificantly greater reduction in peripheral systolic blood pressure (SBP) with labetalol than with sodium nitroprusside (29±11% vs. 18±7%, P = 0.08). The decline in peripheral diastolic blood pressure (DBP) with the two agents was comparable, whereas the reduction in peripheral pulse pressure was 8±16% with SNP and 33±17% with labetalol (P = 0.01). The decline in reflection magnitude was greater with SNP than with labetalol. There were no significant differences in the reduction of central BP with SNP and labetalol. The amplification of PP increased with SNP but did not change with labetalol. CONCLUSIONS We found no difference in central SBP or PP in subjects treated with SNP and labetalol, but labetalol produced a greater reduction in peripheral SBP and PP in the immediate treatment of malignant hypertension.
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Affiliation(s)
- Bas van den Bogaard
- Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
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RAS in Pregnancy and Preeclampsia and Eclampsia. Int J Hypertens 2012; 2012:739274. [PMID: 23346385 PMCID: PMC3546487 DOI: 10.1155/2012/739274] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 12/14/2012] [Indexed: 11/18/2022] Open
Abstract
Preeclampsia is a common disease of pregnancy characterized by the presence of hypertension and commitment of many organs, including the brain, secondary to generalized endothelial dysfunction. Its etiology is not known precisely, but it involved several factors, highlighting the renin angiotensin system (RAS), which would have an important role in the origin of multisystem involvement. This paper reviews the evidence supporting the involvement of RAS in triggering the disease, in addition to the components of this system that would be involved and how it eventually produces brain engagement.
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Abstract
Eclampsia is defined in the obstetrical literature as the occurrence of unexplained seizure during pregnancy in a woman with preeclampsia. In the Western world, the incidence of eclampsia is ~1 per 2000 to 1 per 3000 pregnancies, but the incidence is 10-fold higher in tertiary referral centers and undeveloped countries where there is poor prenatal care, and in multi-fetal gestations. Nearly 1 in 50 women with eclampsia die as do 1 in 14 of their offspring, and mortality rates are considerably higher in undeveloped countries. Eclampsia is also associated with significant life-threatening complications, including neurological events. Seizure acutely can cause stroke, haemorrhage, oedema and brain herniation and thus lead to epilepsy and cognitive impairment later in life.
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Choi SJ, Lee JE, Oh SY, Kim GM, Cho YS, Lee KH, Kim JH, Roh CR. Maternal cerebral blood flow and glucose metabolism in pregnancies complicated by severe preeclampsia. Hypertens Pregnancy 2010; 31:177-88. [PMID: 20860493 DOI: 10.3109/10641955.2010.507839] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To investigate maternal cerebral blood flow and glucose metabolism in pregnancies complicated by severe preeclampsia compared to normal pregnancies. METHODS A prospective study was conducted including six women with severe preeclampsia and nine normotensive women. Transcranial Doppler (TCD) was performed pre- and postoperatively. The anterior, middle, and posterior cerebral arteries (ACA, MCA, PCA) were selected for study; the cerebral perfusion pressure (CPP) and cerebral flow index (CFI) were calculated for each vessel. To evaluate the cerebral glucose metabolism, F-18 fluorodeoxyglucose positron emission tomography was performed postoperatively. RESULTS The preoperative CFI in each artery was similar in the comparisons between the two groups. However, the CPP in the MCA and the PCA was higher in the patients with severe preeclampsia. Compared to the preoperative values, the postoperative CPP and CFI in the ACA and the MCA were significantly increased in the severe preeclampsia group, while they were significantly decreased in the control group. Overall, the regional cerebral glucose uptake was not significantly different in comparisons between the two groups. In addition, there was no correlation between the cerebral Doppler indices and their corresponding regional cerebral glucose uptake. CONCLUSIONS Severe preeclampsia was associated with an increase in the cerebral blood flow and perfusion pressure, particularly during the postpartum period, but it was not associated with a significant change in the cerebral glucose metabolism.
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Affiliation(s)
- Suk-Joo Choi
- Department of Obstetrics and Gynecology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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19
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Lorenz MW, Loesel N, Thoelen N, Gonzalez M, Lienerth C, Dvorak F, Rölz W, Humpich M, Sitzer M. Effects of poor bone window on the assessment of cerebral autoregulation with transcranial Doppler sonography - a source of systematic bias and strategies to avoid it. J Neurol Sci 2009; 283:49-56. [PMID: 19268307 DOI: 10.1016/j.jns.2009.02.329] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND The consequences of poor insonation conditions on autoregulation parameters assessed with transcranial Doppler (TCD) are unclear. METHODS We present two new complementary methods to assess the quality of a TCD signal. Inserting a thin aluminium foil between TCD probe and skin makes a simple model to artificially worsen a good insonation window. Validation studies are presented. We assessed insonation quality and cerebral autoregulation parameters with transfer function analysis and cross correlation in 46 healthy volunteers with and without the aluminium foil model. The same studies were operated on 45 patients with good insonation windows, naïve, after worsening the bone window and during constant infusion of an ultrasound contrast agent. For studying reproducibility, we assessed autoregulation twice in 30 patients with poor bone windows, with and without constant contrast infusion. RESULTS Both methods to measure insonation quality are valid and reproducible. The aluminium foil model realistically simulates a natural poor bone window, reducing the signal quality (e.g. energy of the signal spectrum from 33.4+/-3.5 to 26.2+/-2.5 dB, p<0.001). Thereby, the autoregulation parameters are systematically biased (e.g. phase difference from 37.3+/-10.1 degrees to 25.9+/-15.1 degrees , p<0.001); while with the use of an ultrasound contrast agent this can be largely compensated (phase difference 35.7+/-10.7 degrees , p<0.001). The reproducibility is significantly improved (ICC from 0.76 to 0.90, p<0.05). CONCLUSIONS Poor bone windows can cause considerable bias in TCD autoregulation parameters. This bias might be avoided by the use of ultrasound contrast agents, which may greatly improve the credibility of TCD autoregulation assessment in elderly patients.
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Affiliation(s)
- Matthias W Lorenz
- Department of Neurology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany.
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20
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Sorond FA, Serrador JM, Jones RN, Shaffer ML, Lipsitz LA. The sit-to-stand technique for the measurement of dynamic cerebral autoregulation. ULTRASOUND IN MEDICINE & BIOLOGY 2009; 35:21-9. [PMID: 18834658 PMCID: PMC2680703 DOI: 10.1016/j.ultrasmedbio.2008.08.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2008] [Revised: 07/16/2008] [Accepted: 08/01/2008] [Indexed: 05/08/2023]
Abstract
Measurement of cerebral autoregulation is important for the evaluation and management of a number of clinical disorders that affect cerebral blood flow. We currently lack simple bedside measures that mimic common physiologic stresses. Therefore, we evaluated a new sit-to-stand technique as an alternative method to the frequently-used thigh-cuff technique in healthy volunteers. Continuous middle cerebral artery (MCA) blood flow velocities (BFV) and arterial blood pressure (ABP) were measured in response to standing from a sitting position, or rapid thigh-cuff deflation in 24 healthy subjects (50 +/- 22 y). Autoregulatory index (ARI) was calculated as the BFV response for step changes in ABP using a second-order differential equation with a set of parameters that can be used to grade the performance of autoregulation. Of these 24 subjects, 30% could tolerate only two thigh-cuffs and refused to proceed with the third cuff, whereas none of our subjects had any difficulty with performing the three sit-to-stand trials. The two techniques produced similar changes in mean ABP, but the times to nadir of the blood pressure and BFV were significantly faster for the thigh-cuff. The mean group ARIs were similar between the two techniques. Although between-subjects variability was higher for sit-to-stand ARIs, the within-subject sit-to-stand ARI variability was small. Thus, for the assessment of cerebral autoregulation, the sit-to-stand procedure is well tolerated and produces ARI values that have low within-subject variability. The sit-to-stand technique appears to be a suitable measure of individual ARI values for inferring dynamic cerebral autoregulation.
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Affiliation(s)
- Farzaneh A Sorond
- Department of Neurology, Stroke Division, Brigham and Women's Hospital, Boston, MA 02115, USA.
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21
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Martens EGHJ, Peeters LLH, Gommer ED, Mess WH, van de Vosse FN, Passos VL, Reulen JPH. The visually-evoked cerebral blood flow response in women with a recent history of preeclampsia and/or eclampsia. ULTRASOUND IN MEDICINE & BIOLOGY 2009; 35:1-7. [PMID: 18845379 DOI: 10.1016/j.ultrasmedbio.2008.08.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2008] [Revised: 07/11/2008] [Accepted: 08/05/2008] [Indexed: 05/26/2023]
Abstract
Several studies provide evidence for altered cerebral hemodynamics during (pre)eclampsia. Whether (pre)eclampsia has a persistent negative impact on cerebral hemodynamics, possibly contributing to an elevated risk of premature stroke, is unknown. The aims of this study were (i) to refine and apply a control system-based method previously introduced by Rosengarten to quantify the visually-evoked blood flow response of the posterior cerebral artery (PCA); and (ii) to test the hypothesis with this method that cerebral hemodynamics in women with a recent history of (pre)eclampsia is abnormal relative to that in parous controls. Hereto, we recorded cerebral blood flow velocity (CBFV) in the PCA by transcranial Doppler (TCD) sonography during cyclic visual stimulation in 15 former preeclamptics, 13 former eclamptics and 13 controls. The typical CBFV response was fitted with the step response of a second-order-linear model enabling quantification by parameters K (gain), zeta (damping), omega (natural frequency), T(v) (rate time) and T(d) (time delay). The method refinement introduced here consisted of response filtering before quantification and of considering the individual instead of group-averaged response patterns. Application of this refinement reduced the fitting errors (1.4 +/- 1.2 vs. 3.2 +/- 1.8, p < 0.01). Intergroup differences in model parameters were not found. Although statistically not significant, a trend was observed that critical damping (zeta>1) occurred more frequently in the combined group of former patients than in the controls (7 of 28 vs.1 of 13, p = 0.16). Critical damping (zeta>1) reflects an abnormal response, which is either compensated for by a rise in rate time ("intermediate"; zeta>1; T(v) > 20) or remains uncompensated ("sluggish"; zeta>1; T(v) < 20). Critical damping increased significantly (p = 0.039) with (pre-)eclampsia-to-test-interval in the PE+E patients with abnormal responses (zeta>1), suggesting that (pre)eclampsia might induce diminishing cerebral hemodynamic function over time. Based on a system-analytical classification approach, the data of this study provide evidence for individual CBFV responses to be abnormal in former (pre)eclamptics compared with controls. Further study is needed to reveal how the abnormal CBFV response classification reflects cerebrovascular dysfunction.
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Affiliation(s)
- E G H J Martens
- Department of Clinical Neurophysiology, University Hospital Maastricht, Maastricht, The Netherlands.
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22
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Lorenz MW, Thoelen N, Loesel N, Lienerth C, Gonzalez M, Humpich M, Roelz W, Dvorak F, Sitzer M. Assessment of cerebral autoregulation with transcranial Doppler sonography in poor bone windows using constant infusion of an ultrasound contrast agent. ULTRASOUND IN MEDICINE & BIOLOGY 2008; 34:345-353. [PMID: 17976899 DOI: 10.1016/j.ultrasmedbio.2007.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2007] [Revised: 07/22/2007] [Accepted: 09/04/2007] [Indexed: 05/25/2023]
Abstract
Cerebral autoregulation is an important pathophysiological and prognostic parameter for a variety of neurologic conditions. It can be assessed quickly and safely using transcranial Doppler sonography (TCD). In elderly patients, poor insonation conditions decrease the number of examinable patients and can cause a systematic bias in autoregulation parameters. The aim of this study was to investigate whether a constant infusion of an ultrasound contrast agent (Levovist((R))) can counteract these effects. We examined two cohorts of unselected neurologic patients. In 45 patients with good insonation windows (cohort 1), we used a thin aluminium foil between the skin and the TCD probe to artificially decrease the insonation quality. We determined two parameters of cerebral autoregulation (phase difference [PD] and a cross-correlation coefficient [Mx]) in native patients, with aluminium foil and with aluminium foil and a constant infusion of Levovist. In 30 patients with poor insonation windows (cohort 2), we measured the autoregulation twice, with and without an infusion of Levovist, to assess the reproducibility of the autoregulation parameters. In cohort 1, the foil model significantly decreased the Doppler signal quality, i.e., the mean spectrum energy decreased from 33.9 +/- 2.7 dB to 26.3 +/- 2.4 dB (p < 0.001). This introduced a significant bias to all autoregulation parameters (PD: decreased from 38.2 +/- 10.0 degrees to 27.9 +/- 12.5 degrees (p < 0.001); Mx: decreased from 0.308 +/- 0.170 to 0.254 +/- 0.162 (p < 0.01)). Both effects were compensated largely by a constant infusion of Levovist (300 mg/min). In cohort 2, infusion of the contrast agent at the same rate increased insonation quality, too, but to a lesser degree (27.4 +/- 2.4 dB to 32.0 +/- 3.7 dB, p < 0.001). This smaller increase did not cause a significant change in the autoregulation parameters, but the reproducibility of the PD was significantly improved (intraclass coefficient coefficient [ICC] 0.76, 95% confidence interval [0.59-0.87] in native poor bone window compared with ICC 0.90, 95% confidence interval [0.81-0.95] with infusion of the contrast agent). Our data show that constant infusion of an ultrasound contrast agent during the assessment of cerebral autoregulation can avoid potential bias introduced by poor insonation conditions. Furthermore, infusion of the contrast agent can improve reproducibility and contribute to the credibility of autoregulation assessment in the elderly. (E-mail: matthias.lorenz@em.uni-frankfurt.de).
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Affiliation(s)
- Matthias W Lorenz
- Department of Neurology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany.
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Lorenz MW, Gonzalez M, Lienerth C, Loesel N, Thoelen N, Sitzer M. Influence of temporal insonation window quality on the assessment of cerebral autoregulation with transcranial Doppler sonography. ULTRASOUND IN MEDICINE & BIOLOGY 2007; 33:1540-5. [PMID: 17544566 DOI: 10.1016/j.ultrasmedbio.2007.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2006] [Revised: 04/03/2007] [Accepted: 04/21/2007] [Indexed: 05/15/2023]
Abstract
Cerebral autoregulation can be assessed quickly and noninvasively using transcranial Doppler sonography (TCD). A poor transtemporal insonation window is a common limitation in TCD examinations. The effects of insonation quality on TCD autoregulation measurements have never been investigated. We developed two methods to quantitatively measure insonation quality. We also validated a model to artificially worsen the insonation window. This involves inserting a thin aluminium foil between the TCD probe and the skin. Forty-six healthy volunteers underwent TCD examination before and after artificial reduction of the transtemporal insonation quality. Two autoregulation parameters, the phase difference (PD) and a cross-correlation coefficient (Mx), were calculated from the recordings. The aluminium foil model realistically simulates poor insonation conditions, producing a decrease in the signal power from 36.4 +/- 2.8 dB to 32.0 +/- 1.5 dB. In corrupted insonation windows, the PD is artificially low (native: 34.2 +/- 9.3 degrees , corrupted: 29.9 +/- 9.7 degrees , p = 0.002), but the Mx is not significantly different. Insonation quality may introduce a systematic bias of clinically relevant magnitude into TCD-based cerebral autoregulation studies. This must be considered when studies of elderly patients are planned. This article discusses strategies to account for this bias.
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Affiliation(s)
- Matthias W Lorenz
- Department of Neurology, Johann Wolfgang Goethe University, Frankfurt am Main, Germany.
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Affiliation(s)
- Marilyn J Cipolla
- Department of Neurology, University of Vermont College of Medicine, Burlington, VT 05405, USA.
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Euser AG, Cipolla MJ. Cerebral blood flow autoregulation and edema formation during pregnancy in anesthetized rats. Hypertension 2007; 49:334-40. [PMID: 17200432 DOI: 10.1161/01.hyp.0000255791.54655.29] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Eclampsia is considered a form of hypertensive encephalopathy in which an acute elevation in blood pressure causes autoregulatory breakthrough, blood-brain barrier disruption, and edema formation. We hypothesized that pregnancy predisposes the brain to eclampsia by lowering the pressure of autoregulatory breakthrough and enhancing cerebral edema formation. Because NO production is increased in pregnancy, we also investigated the role of NO in modulating autoregulation. Cerebral blood flow autoregulation was determined by phenylephrine infusion and laser Doppler flowmetry. Four groups were studied: untreated nonpregnant (n=7) and late-pregnant (days 19 to 21; n=8) Sprague-Dawley rats and nonpregnant (n=8) and late-pregnant (n=8) animals treated with an NO synthase inhibitor (N(G)-nitro-l-arginine methyl ester; 0.5 to 0.7 g/L). Brain water content and blood-brain barrier permeability to sodium fluorescein were determined after breakthrough. Pregnancy caused no change in autoregulation or the pressure of breakthrough. However, treatment with the NO synthase inhibitor significantly increased the pressure of autoregulatory breakthrough (nonpregnant: 183.6+/-3.0 mm Hg versus 212.0+/-2.8 mm Hg, P<0.05; late-pregnant: 180.8+/-3.2 mm Hg versus 209.3+/-4.7 mm Hg, P<0.05). After autoregulatory breakthrough, only late-pregnant animals showed a significant increase in cerebral edema formation, which was attenuated by NO synthase inhibition. There was no difference in blood-brain barrier permeability between nonpregnant and late-pregnant animals in response to acute hypertension, suggesting that pregnancy may predispose the brain to eclampsia by increasing cerebral edema through increased hydraulic conductivity.
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Affiliation(s)
- Anna G Euser
- Department of Neurology, University of Vermont, 89 Beaumont Ave, Given C454, Burlington, VT 05405, USA
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Reinhard M, Roth M, Guschlbauer B, Harloff A, Timmer J, Czosnyka M, Hetzel A. Dynamic Cerebral Autoregulation in Acute Ischemic Stroke Assessed From Spontaneous Blood Pressure Fluctuations. Stroke 2005; 36:1684-9. [PMID: 16020768 DOI: 10.1161/01.str.0000173183.36331.ee] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background and Purpose—
This study investigates dynamic cerebral autoregulation assessed from spontaneous blood pressure (ABP) and cerebral blood flow velocity (CBFV) fluctuations and its time course in acute ischemic stroke.
Methods—
Forty patients admitted with acute ischemic stroke in the territory of the middle cerebral artery (MCA) were enrolled. Admission National Institutes of Health Stroke score was 6±4. Study 1 was performed within 22 (±11) hours and study 2 was performed within 134 (±25) hours of ictus. The final analysis comprised 33 and 29 patients for study 1 and study 2, respectively. Twenty-five age- and sex-matched controls were studied. ABP (Finapres method) and CBFV in both MCAs (transcranial Doppler) were recorded over 10 minutes. Correlations between diastolic and mean ABP and CBFV fluctuations were averaged, yielding the correlation coefficient indices (Dx, Mx). Transfer function analysis was applied to obtain phase shift and gain between ABP and CBFV oscillations.
Results—
No disturbance of autoregulation was indicated by all parameters at study 1. Separate analyses for clinical severity, stroke side, and size did not reveal significant differences for the various autoregulatory indices at study 1 and 2. At study 2, MCA flow velocity was significantly increased on both sides, the autoregulation index Mx was slightly but significantly (
P
<0.05) worse on both sides in comparison to study 1, and phase showed a trend toward poorer values on affected sides. No significant differences to controls occurred. Clinical outcome in patients completing both studies was good in all but one patient.
Conclusions—
Dynamic cerebral autoregulation assessed from spontaneous blood pressure fluctuations does not seem to be relevantly disturbed in early minor MCA stroke. At the subacute stage, slight autoregulatory disturbance may be present.
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Affiliation(s)
- M Reinhard
- Department of Neurology and Clinical Neurophysiology, University of Freiburg, Germany.
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Martin JN, Thigpen BD, Moore RC, Rose CH, Cushman J, May W. Stroke and severe preeclampsia and eclampsia: a paradigm shift focusing on systolic blood pressure. Obstet Gynecol 2005; 105:246-54. [PMID: 15684147 DOI: 10.1097/01.aog.0000151116.84113.56] [Citation(s) in RCA: 337] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To identify important clinical correlates of stroke in patients with preeclampsia and eclampsia. METHODS The case histories of 28 patients who sustained a stroke in association with severe preeclampsia and eclampsia were scrutinized with particular attention to blood pressures. RESULTS Stroke occurred antepartum in 12 patients, postpartum in 16. Stroke was classified as hemorrhagic-arterial in 25 of 27 patients (92.6%) and thrombotic-arterial in 2 others. Multiple sites were involved in 37% without distinct pattern. In the 24 patients being treated immediately before stroke, systolic pressure was 160 mm Hg or greater in 23 (95.8%) and more than 155 mm Hg in 100%. In contrast, only 3 of 24 patients (12.5%) exhibited prestroke diastolic pressures of 110 mm Hg or greater, only 5 of 28 reached 105 mm Hg, and only 6 (25%) exceeded a mean arterial pressure of 130 mm Hg before stroke. Only 3 patients received prestroke antihypertensives. Twelve patients sustained a stroke while receiving magnesium sulfate infusion; 8 had eclampsia. Although all blood pressure means after stroke were significantly higher than prestroke, only 5 patients exhibited more than 110 mm Hg diastolic pressures. In 18 of 28 patients, hemolysis, elevated liver enzymes, low platelets syndrome did not significantly alter blood pressures compared with non-hemolysis, elevated liver enzymes, low platelets. Mean systolic and diastolic changes from pregnancy baseline to prestroke values were 64.4 and 30.6 mm Hg, respectively. Maternal mortality was 53.6%; only 3 patients escaped permanent significant morbidity. CONCLUSION In contrast to severe systolic hypertension, severe diastolic hypertension does not develop before stroke in most patients with severe preeclampsia and eclampsia. A paradigm shift is needed toward considering antihypertensive therapy for severely preeclamptic and eclamptic patients when systolic blood pressure reaches or exceeds 155-160 mm Hg. LEVEL OF EVIDENCE III.
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Affiliation(s)
- James N Martin
- Department of Obstetrics and Gynecology, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216-4505, USA.
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