infarction

梗塞
  • 文章类型: Journal Article
    背景:脊髓梗死是一种罕见的神经系统疾病。我们介绍了一例由左椎动脉(VA)起源支架置入引起的高颈索梗塞。脊髓梗塞的发生率很低,它必须与许多其他疾病区分开来。诊断主要基于影像学,临床症状,和历史。目前,脊髓梗塞没有集中治疗。溶栓,大剂量糖皮质激素休克,管扩张,以促进循环,在疾病的早期给予营养神经营养药物都可以帮助减缓疾病的进展。在病因上没有达成一致,诊断,或这些人的治疗选择。
    方法:2023年10月7日,一名81岁的男子因反复发作的胸闷和疼痛而入院,持续超过2年零1个月。入院时的脑血管造影显示右VA明显阻塞,左椎动脉起源狭窄。入院后六天,在局部麻醉下进行药物洗脱支架置入手术,通过股动脉打开左VA起点.按照程序,患者在所有4个肢体中都出现了肌肉力量的进行性丧失和颈3脊髓以下的截瘫。手术后一周,病人出院了。手术后,1周后患者出院.手术后,患者的症状持续了一个月。
    结论:当手术后出现颈部不适和肢体无力并伴有进行性进展时,需要高度关注高颈索梗死。在临床上,由于VA起源的狭窄而置入支架后,高颈索梗塞的并发症并不常见。通过及时的诊断和护理可以改善患者的预后。
    BACKGROUND: Spinal cord infarction is an uncommon nervous system disorder. We present a case of high cervical cord infarction caused by stenting of the origin of the left vertebral artery (VA). The incidence of spinal cord infarction is minimal, and it must be distinguished from a number of other disorders. The diagnosis is primarily based on imaging, clinical symptoms, and history. Currently, there is no focused treatment for spinal cord infarction. Thrombolysis, high-dose glucocorticoid shocks, tube dilatation to promote circulation, and nutritional neurotropic medicines given early in the course of the disease can all help to slow the disease\'s progression. There is no agreement on the etiology, diagnosis, or therapy options for these people.
    METHODS: On October 7, 2023, an 81-year-old man was admitted to the hospital primarily for recurrent chest tightness and pain that had persisted for more than 2 years and 1 month. Cerebral angiography upon admission revealed significant blockage of the right VA and stenosis of the left vertebral arterial origin. Six days following admission, a drug-eluting stenting procedure was carried out under local anesthesia to open the left VA origin via the femoral artery. Following the procedure, the patient experienced a progressive loss of muscle strength in all 4 limbs and paraplegia below the cervical 3 spinal cord. One week following the procedure, the patient was released from the hospital. After the procedure, the patient was released 1 week later. After the procedure, the patient\'s symptoms persisted for a month.
    CONCLUSIONS: High awareness for high cervical cord infarction is required when neck discomfort and limb weakness with progressive progression arises after surgery. Complications of high cervical cord infarction following stenting for stenosis of VA origin are uncommon in clinical settings. Patients\' prognoses can be improved by prompt diagnosis and care.
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  • 文章类型: Journal Article
    去骨瓣减压术(DC)是一种神经外科技术,由于全球范围内头部受伤的死灰复燃,引起了人们的新兴趣。我们旨在分析在资源有限的情况下接受此手术的患者的管理质量和预后。
    这是一个前景,纵向,描述性,描述性以及Strobe之后的分析研究,在尼亚美国家医院接受DC治疗的患者持续36个月。P≤0.05被认为是显著的。
    在我们的研究中,我们收集了74例DC。平均年龄为32.04岁(10-75岁),男性占主导地位(91.89%)。DC主要在头部外伤后进行(95.95%),主要原因是道路交通事故(76%;54/71)。一入场,大多数患者表现为意识改变(95.95%)和瞳孔异常(62.16%)。脑损伤与脑部扫描之间的平均时间为31.28h,实质挫伤是最常见的病变(90.54%)。大多数患者(94.59%)接受了去骨瓣减压术。术后并发症占全部病例的71.62%,33.78%导致死亡。在幸存者中,55.10%在上次咨询时出现神经系统后遗症(27/49)。与死亡和发病风险相关的主要因素是格拉斯哥昏迷评分≤8分,入院时瞳孔异常,大脑参与的迹象的存在,还有很长的入学延迟.
    我们的研究表明,有限的资源对我们的护理的影响是适度的。未来的研究将集中在长期监测上,特别关注DC后患者的心理社会融合。
    UNASSIGNED: Decompressive craniectomy (DC) is a neurosurgical technique that is gaining renewed interest due to the worldwide resurgence of head injuries. We aimed to analyze the quality of management and prognosis of patients who underwent this surgery in the context of limited resources.
    UNASSIGNED: This was a prospective, longitudinal, descriptive, and analytical study following STROBE, lasting 36 months at the National Hospital of Niamey in patients who had undergone DC. P ≤ 0.05 was considered significant.
    UNASSIGNED: During our study, we collected 74 cases of DC. The mean age was 32.04 years (10-75 years), with male predominance (91.89%). DC was mainly performed following head trauma (95.95%), the main cause of which was road traffic accidents (76%; 54/71). On admission, most patients presented with altered consciousness (95.95%) and pupillary abnormalities (62.16%). The average time between brain damage and brain scan was 31.28 h, with parenchymal contusion being the most frequent lesion (90.54%). The majority of patients (94.59%) underwent decompressive hemicraniectomy. Postoperative complications accounted for 71.62% of all cases, with 33.78% resulting in death. Among survivors, 55.10% had neurological sequelae at the last consultation (27/49). The main factors associated with the risk of death and morbidity were a Glasgow coma score ≤8, pupillary abnormality on admission, the presence of signs of brain engagement, and a long admission delay.
    UNASSIGNED: Our study shows that the impact of limited resources on our care is moderate. Future research will concentrate on long-term monitoring, particularly focusing on the psychosocial reintegration of patients post-DC.
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  • 文章类型: Case Reports
    背景:脊髓梗塞(SCI)是一种罕见疾病,占所有中风的近1%,表现出各种各样的症状。SCI的诊断因其发病率低、症状多样而具有很大的挑战性,并可能被误诊为视神经脊髓炎谱系障碍(NMOSD)。
    方法:我们描述了一个18岁女孩的病例,该女孩因急性颈部疼痛和左上肢和下肢松弛性麻痹出现在急诊科。几小时后,她出现了呼吸暂停,并接受了气管内插管。脑MRI正常,但脊髓MRI显示非增强的纵向异常高T2信号强度从C1延伸到C5。患者接受甲基强的松龙(每天1克,连续7天)联合物理治疗的类固醇治疗。3周后拔管,住院30天后出院,左肢肌肉力量为4/5。
    结论:青春期特发性脊髓损伤是一种罕见但通常具有破坏性的疾病,其病理生理学未知,然而,青少年的一些特殊情况,如未成熟脊柱的机械应力,可被认为是SCI发展的危险因素.早期诊断和治疗可以改善SCI的预后。
    BACKGROUND: Spinal cord infarction (SCI) is a rare disease representing nearly 1% of all strokes with a wide variety of symptoms at presentation. SCI diagnosis is very challenging owing to its low incidence and the variety of symptoms, and could be misdiagnosed with neuromyelitis optica spectrum disorders (NMOSD).
    METHODS: We describe the case of an 18-year-old girl who presented to the emergency department with acute neck pain and flaccid paralysis of the left upper and lower extremities. Few hours later, she developed apnea and was endotracheally intubated. Brain MRI was normal but spinal cord MRI revealed non-enhancing longitudinal abnormal high T2 signal intensity extending from C1 to C5. The patient underwent steroid therapy with methylprednisolone (1 g daily for 7 consecutive days) combined with physiotherapy. She was extubated after 3 weeks and discharged after 30 days of hospitalization with a muscle force of 4/5 in her left extremities.
    CONCLUSIONS: Idiopathic SCI in adolescence is a rare but often devastating disorder with unknown pathophysiology, however, some specific conditions in adolescent such as mechanical stresses on the immature spine can be considered as risk factors for SCI development. Early diagnosis and treatment can improve outcomes in SCI.
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  • 文章类型: Case Reports
    背景:肾上腺梗塞(AI)是一种罕见的肾上腺损害,这在系统性红斑狼疮中相对常见,抗磷脂抗体综合征(APS)和妊娠。AI的诊断主要通过计算机断层扫描(CT)和磁共振成像,但很容易与其他肾上腺疾病混淆。因此,这份报告详细介绍了系统性红斑狼疮的AI状况,APS并从影像学上做出了鉴别诊断。
    方法:我们报告了一例55岁的女性,她的窝腋窝和腹股沟区疼痛。然后CT扫描显示双侧肾上腺疾病,病人被诊断为系统性红斑狼疮,附加自身免疫检查后的APS和AI。
    方法:患者诊断为系统性红斑狼疮合并狼疮性肾炎,血液学损伤和门脑炎,APS,AI和继发性凝血障碍。
    方法:患者接受甲基强的松龙治疗,羟氯喹和低分子肝素。
    结果:患者在治疗1年后病情缓解并保持健康。
    AI可以分为出血性和非出血性,以双侧病变多见。在我们的案例中,人工智能是双边的,部分受累且非出血性,“截止符号”最早是在CT中提出的,这可能有助于诊断。
    BACKGROUND: Adrenal infarction (AI) is a rare type of adrenal damage, which is relatively common in systemic lupus erythematosus, antiphospholipid antibody syndrome (APS) and pregnancy. The diagnosis of AI is mainly by computed tomography (CT) and magnetic resonance imaging, but is easily confused with other adrenal disease. Hence, this report details a condition of AI with systemic lupus erythematosus, APS and made a differential diagnosis from imaging.
    METHODS: We report a case of a 55-year-old woman with pain in her fossa axillaries and inguinal regions. Then CT scan disclosed bilateral adrenal diseases, and the patient was diagnosed with systemic lupus erythematosus, APS and AI after additional autoimmune examinations.
    METHODS: The patient was diagnosed as systemic lupus erythematosus with lupus nephritis, hematological damage and oromeningitis, APS, AI and secondary blood coagulation disorders.
    METHODS: The patient was treated with methylprednisolone, hydroxychloroquine and low molecular heparin.
    RESULTS: The patient relieves and remains well 1 year after treatment.
    UNASSIGNED: AI can be divided hemorrhagic and non-hemorrhagic, with bilateral lesions more common. In our case, the AI was bilateral, partially involved and non-hemorrhagic, and the \"cutoff sign\" was first put forward in CT, which might assist the diagnosis.
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  • 文章类型: Journal Article
    血管内大脑中动脉闭塞(MCAO)是一种广泛使用的实验性缺血性中风模型。然而,该模型具有很高的早期死亡率。我们的目的是研究短暂性MCAO后再灌注48小时内影响早期死亡率的因素。使用C57BL/6小鼠,我们诱导了1小时血管内细丝MCAO。为了引入梗死体积的异质性,一部分动物有额外的串联颈总动脉闭塞(MCAO+CCAO).连续视频监控用于了解死亡原因。在合并队列中,48小时内的死亡率为25%。所有早期死亡的动物都患有海马区梗塞,有时伴有丘脑和中脑梗塞,仅发生在MCAO+CCAO组。所有早期死亡的动物都发生了在视频监控中捕获的惊厥性癫痫发作。没有发生惊厥性癫痫发作的动物都没有死亡。在这三个地区中,海马梗死似乎是惊厥性癫痫发作和早期死亡所必需的。我们的数据强调癫痫发作是血管内细丝MCAO后最初48小时内死亡的主要原因,与海马梗死有关.由于海马血液供应主要来自大脑后动脉(PCA),避免并发PCA缺血可以降低近端MCAO模型的死亡率.
    Endovascular middle cerebral artery occlusion (MCAO) is a widely used experimental ischemic stroke model. However, the model carries high early mortality. Our aim was to investigate the factors that influence early mortality within 48 h of reperfusion after transient MCAO. Using C57BL/6 mice, we induced 1-hour endovascular filament MCAO. To introduce heterogeneity of infarct volumes, a subset of animals had additional tandem common carotid artery occlusion (MCAO+CCAO). Continuous video monitoring was used to gain insight into the cause of death. Mortality within 48 h was 25% in the pooled cohort. All animals with early mortality suffered from infarcts in the hippocampus, sometimes accompanied by infarcts in the thalamus and midbrain, which occurred exclusively in the MCAO+CCAO group. All animals with early mortality developed convulsive seizures captured on video monitoring. None of the animals that did not develop convulsive seizures died. Among the three regions, hippocampal infarction appeared necessary for convulsive seizures and early mortality. Our data highlight seizures as the primary cause of mortality within the first 48 h after endovascular filament MCAO, linked to hippocampal infarction. Since hippocampal blood supply is mainly from the posterior cerebral artery (PCA), avoiding concurrent PCA ischemia can decrease mortality in proximal MCAO models.
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  • 文章类型: Journal Article
    血管造影程序存在一些技术限制,包括特定位置的次优可视化和仅提供有关血管腔轮廓的信息的血管造影,而血管内超声(IVUS)提供有关冠状动脉血管病变的壁组成的信息。最近的试验证明IVUS优于标准血管造影,我们的荟萃分析旨在评估和总结目前的证据,即在左冠状动脉主干(LMCA)疾病患者中,IVUS引导的药物洗脱支架(DES)置入是否比血管造影引导的DES置入产生更好的结局.这项荟萃分析旨在分析LMCA疾病患者IVUS引导和血管造影引导药物洗脱支架(DES)放置的当前证据。
    使用Scopus进行文献检索,Embase,PubMed,EuropePMC,和Clinicaltrials.gov使用PRISMA指南。我们研究中的干预组是接受IVUS引导的经皮冠状动脉介入治疗(PCI)的患者,对照组是接受血管造影单独引导的PCI的患者。心血管死亡率,全因死亡率,靶病变血运重建,心肌梗塞,比较两组支架内血栓形成情况。
    本荟萃分析纳入了11项研究,包括24,103名患者。IVUS指导的PCI与较低的心血管死亡率相关(风险比(HR)0.39[95%CI0.26,0.58],p<0.001;I2:75%,p<0.001)和全因死亡率(HR0.59[95%CI0.53,0.66],p<0.001;I2:0%,p=0.45)与仅血管造影引导的PCI相比。接受IVUS引导PCI的组心肌梗死发生率较低(HR0.66[95%CI0.48,0.90],p=0.008;I2:0%,p=0.98),靶病变血运重建(HR0.45[95%CI0.38,0.54],p<0.001;I2:41%,p=0.10)和支架血栓形成(HR0.38[95%CI0.26,0.57],p<0.001;I2:0%,p=0.50)与对照组相比。
    我们的荟萃分析表明,IVUS引导的DES放置具有较低的心血管死亡率,全因死亡率,靶病变血运重建,心肌梗塞,和支架内血栓形成比血管造影引导下的DES植入。
    UNASSIGNED: Several technical limitations exist in angiography procedures, including suboptimal visualization of a particular location and angiography only providing information about the contour of the vascular lumen, while intravascular ultrasound (IVUS) provides information regarding wall composition on coronary vascular lesions. With recent trials demonstrating IVUS benefits over standard angiography, our meta-analysis aimedto evaluate and summarize the current evidence on whether IVUS-guided drug-eluting stent (DES) placement resulted in better outcomes than the angiography-guided DES placement in patients with left main coronary artery (LMCA) disease. This meta-analysis aimed to analyze the current evidence on the IVUS-guided and angiography-guided drug-eluting stent (DES) placement in patients with LMCA disease.
    UNASSIGNED: Literature searching was performed using Scopus, Embase, PubMed, EuropePMC, and Clinicaltrials.gov using PRISMA guidelines. The intervention group in our study are patients undergoing IVUS-guided percutaneous coronary intervention (PCI) and the control group are patients undergoing angiography alone-guided PCI. Cardiovascular mortality, all-cause mortality, target lesion revascularization, myocardial infarction, and stent thrombosis were compared between the two groups.
    UNASSIGNED: There were 11 studies comprising 24,103 patients included in this meta-analysis. IVUS-guided PCI was associated with lower cardiovascular mortality (hazard ratio (HR) 0.39 [95% CI 0.26, 0.58], p < 0.001; I 2 : 75%, p < 0.001) and all-cause mortality (HR 0.59 [95% CI 0.53, 0.66], p < 0.001; I 2 : 0%, p = 0.45) compared to angiography alone guided PCI. The group receiving IVUS guided PCI has a lower incidence of myocardial infarction (HR 0.66 [95% CI 0.48, 0.90], p = 0.008; I 2 : 0%, p = 0.98), target lesion revascularization (HR 0.45 [95% CI 0.38, 0.54], p < 0.001; I 2 : 41%, p = 0.10) and stent thrombosis (HR 0.38 [95% CI 0.26, 0.57], p < 0.001; I 2 : 0%, p = 0.50) compared to the control group.
    UNASSIGNED: Our meta-analysis demonstrated that IVUS-guided DES placement had lower cardiovascular mortality, all-cause mortality, target lesion revascularization, myocardial infarction, and stent thrombosis than angiography-guided DES implantation.
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  • 文章类型: Case Reports
    背景:缺血性卒中是一种罕见事件,与潜在恶性肿瘤引起的血凝块形成风险升高相关。在这里,我们介绍一例卵巢癌导致脑梗死的病例。
    方法:一名43岁的女性在发现约14厘米的大卵巢肿瘤两天后突然出现右侧瘫痪和说话困难,被怀疑是恶性的。进一步检查发现左侧大脑中动脉梗死。患者有高血压和子宫腺肌病病史。肝素治疗和生命体征管理稳定后,病人接受了减瘤手术,包括全子宫切除术,双侧输卵管卵巢切除术,网膜切除术,双侧盆腔和主动脉旁淋巴结清扫术。最终诊断为右卵巢透明细胞癌(IA期)。随后,患者完成了六轮辅助化疗,同时接受康复治疗。目前,患者能够独立行走,尽管她仍然有失语症。
    结论:迅速的医疗干预和跨学科护理在诸如大卵巢肿瘤等偶然发现的背景下至关重要。
    BACKGROUND: Ischemic stroke is a rare event associated with an elevated risk of blood clot formation owing to an underlying malignancy. Herein, we present a case of ovarian carcinoma that led to cerebral infarction.
    METHODS: A 43-year-old woman experienced sudden onset right-sided paralysis and difficulty speaking two days after discovery of a large ovarian tumor measuring approximately 14 cm, which was suspected to be malignant. Further examination revealed left middle cerebral artery infarction. The patient had a history of hypertension and adenomyosis. Following stabilization with heparin treatment and vital signs management, the patient underwent debulking surgery, including total hysterectomy, bilateral salpingo-oophorectomy, omentectomy, and bilateral pelvic and para-aortic lymph node dissection. The final diagnosis was clear cell carcinoma of the right ovary (stage IA). Subsequently, the patient completed six rounds of adjuvant chemotherapy while simultaneously undergoing rehabilitation. Presently, the patient is able to walk independently, although she still experiences aphasia.
    CONCLUSIONS: Prompt medical intervention and interdisciplinary care are crucial in the setting of incidental findings such as a large ovarian tumor.
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  • 文章类型: Journal Article
    目的:总结150,000次检查的SCMR注册状态。
    背景:心血管磁共振(CMR)越来越多地用于评估不断扩大的心血管疾病。SCMRRegistry是支持心血管研究的现实世界临床数据的中央存储库。包括与结果有关的那些,质量改进,和机器学习。SCMR注册表建立在符合法规的基础上,基于云的基础设施,可容纳可搜索的内容以及医学数字成像和通信(DICOM)图像。
    方法:数据安全的过程,数据提交,并概述了研究访问。我们询问了书记官处,并提供了其内容摘要。
    结果:数据来自美国20个站点的154,458次CMR扫描,包含299,622,066张总图像(约100TB的存储空间)。人类受试者的平均年龄为58岁(范围为1个月至>90岁),44%是女性,72%白种人,死亡率为8%。最常见的适应症是心肌病(27%),最常用的当前程序术语(CPT)代码为75561(35%).2015年后,基于大环钆的造影剂占造影剂利用率的89%。在99%的扫描中进行了短轴扫描,短轴LGE在66%,和30%的应力灌注序列。死亡率数据显示左心室射血分数(LVEF)<35%的患者死亡率增加,壁运动异常的存在,应力灌注缺陷,和梗塞晚期钆增强(LGE),与没有这些标记的人相比。有456,678个患者年的全因死亡率随访,中位随访时间为3.6年。
    结论:SCMRRegistry的愿景是通过协作努力,通过为中心提供一种网络机制,安全地上传去识别的数据和图像进行研究,促进CMR的循证利用。教育,和质量控制。注册表量化随时间变化的实践,并支持对预后效用的大规模现实世界多中心观察研究。
    结论:SCMRRegistry是一个符合监管标准的基于云的中央存储库,用于多中心心血管研究的真实世界临床数据和DICOM图像。包括基于结果的数据。该注册表包含299,622,066个DICOM图像和456,678个患者年随访。来自美国20个地点的154,458次CMR扫描的数据显示,2015年后,心肌病是最常见的适应症,大环钆造影剂利用率为89%。总死亡率为8%,LVEF<35%的患者发病率较高,异常壁运动,缺血存在,或梗塞部位。登记处旨在通过合作努力促进基于证据的CMR利用,以积极影响心血管结果。
    BACKGROUND: Cardiovascular magnetic resonance (CMR) is increasingly utilized to evaluate expanding cardiovascular conditions. The Society for Cardiovascular Magnetic Resonance (SCMR) Registry is a central repository for real-world clinical data to support cardiovascular research, including those relating to outcomes, quality improvement, and machine learning. The SCMR Registry is built on a regulatory-compliant, cloud-based infrastructure that houses searchable content and Digital Imaging and Communications in Medicine images. The goal of this study is to summarize the status of the SCMR Registry at 150,000 exams.
    METHODS: The processes for data security, data submission, and research access are outlined. We interrogated the Registry and presented a summary of its contents.
    RESULTS: Data were compiled from 154,458 CMR scans across 20 United States sites, containing 299,622,066 total images (∼100 terabytes of storage). Across reported values, the human subjects had an average age of 58 years (range 1 month to >90 years old), were 44% (63,070/145,275) female, 72% (69,766/98,008) Caucasian, and had a mortality rate of 8% (9,962/132,979). The most common indication was cardiomyopathy (35,369/131,581, 27%), and most frequently used current procedural terminology code was 75561 (57,195/162,901, 35%). Macrocyclic gadolinium-based contrast agents represented 89% (83,089/93,884) of contrast utilization after 2015. Short-axis cines were performed in 99% (76,859/77,871) of tagged scans, short-axis late gadolinium enhancement (LGE) in 66% (51,591/77,871), and stress perfusion sequences in 30% (23,241/77,871). Mortality data demonstrated increased mortality in patients with left ventricular ejection fraction <35%, the presence of wall motion abnormalities, stress perfusion defects, and infarct LGE, compared to those without these markers. There were 456,678 patient-years of all-cause mortality follow-up, with a median follow-up time of 3.6 years.
    CONCLUSIONS: The vision of the SCMR Registry is to promote evidence-based utilization of CMR through a collaborative effort by providing a web mechanism for centers to securely upload de-identified data and images for research, education, and quality control. The Registry quantifies changing practice over time and supports large-scale real-world multicenter observational studies of prognostic utility.
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  • 文章类型: Case Reports
    我们描述了一名男性重型机械操作员的情况,他在工作中表现出迅速发展的脊髓综合征。脊柱MRI显示胸椎椎体和脊髓梗塞以及由于纤维软骨椎间盘栓塞(FCDE)引起的轻度椎间盘脱垂。在打桩机/重型机械操作人员中,应将纤维软骨椎间盘栓塞视为急性脊髓梗塞的病因机制之一。特别是与相邻椎体梗塞和椎间盘脱出有关。磁共振成像(MRI)变化可能会演变,保证早期随访MRI在适当的情况下。
    We describe the case of a male heavy machinery operator who presented from work with a rapidly evolving spinal cord syndrome. Spinal MRI revealed thoracic vertebral body and cord infarction and evolving mild disc prolapse attributed to fibrocartilaginous disc embolism (FCDE). FCDE should be considered as one of the aetiological mechanisms of acute spinal cord infarction in pile-driver/heavy machinery operators, especially in association with adjacent vertebral body infarction and intervertebral disc prolapse. Magnetic resonance imaging (MRI) changes may evolve, warranting early follow-up MRI in appropriate cases.
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  • 文章类型: Journal Article
    背景:实验性先兆子痫(ePE)已显示卒中的预后恶化。我们研究了低剂量阿司匹林的效果,已知可以预防先兆子痫,中风的血流动力学和结果,以及血管收缩剂和血管扩张剂环氧合酶产物血栓素A2和前列环素之间的关联。
    结果:正常妊娠大鼠在妊娠第20天进行大脑中动脉闭塞3小时,再灌注1小时,并与用载体或低剂量阿司匹林(每天1.5mg/kg)治疗的ePE进行比较。多点激光多普勒用于测量大脑中动脉和侧支血管区域的脑血流量变化。闭塞30分钟后,输注去氧肾上腺素以增加血压并评估脑血流自动调节。使用氯化2,3,5-三苯基四唑染色测量梗塞和水肿。血栓素A2,前列环素,测定血浆中的炎症标志物和脑动脉中的环氧合酶水平。与正常妊娠大鼠相比,ePE梗死增加(P<0.05),阿司匹林降低(P<0.001)。ePE还具有完整的脑血流自动调节功能,并在诱发高血压期间减少侧支灌注,阿司匹林也可以预防这种情况。阿司匹林增加了ePE中的前列环素(P<0.05),而不减少血栓烷B2,血栓烷A2的代谢产物或8-异前列腺素-前列腺素-2α,脂质过氧化的标志。两组之间的脑动脉中环氧合酶水平没有差异。
    结论:低剂量阿司匹林在ePE中减少了与血管扩张剂前列环素增加相关的梗死,并改善了诱导高血压期间的侧支灌注。阿司匹林对大脑和脑循环的有益作用可能是多因素的,值得进一步研究。
    BACKGROUND: Experimental preeclampsia (ePE) has been shown to have worsened outcome from stroke. We investigated the effect of low-dose aspirin, known to prevent preeclampsia, on stroke hemodynamics and outcome, and the association between the vasoconstrictor and vasodilator cyclooxygenase products thromboxane A2 and prostacyclin.
    RESULTS: Middle cerebral artery occlusion was performed for 3 hours with 1 hour of reperfusion in normal pregnant rats on day 20 of gestation and compared with ePE treated with vehicle or low-dose aspirin (1.5 mg/kg per day). Multisite laser Doppler was used to measure changes in cerebral blood flow to the core middle cerebral artery and collateral vascular territories. After 30 minutes occlusion, phenylephrine was infused to increase blood pressure and assess cerebral blood flow autoregulation. Infarct and edema were measured using 2,3,5-triphenyltetrazolium chloride staining. Plasma levels of thromboxane A2, prostacyclin, and inflammatory markers in plasma and cyclooxygenase levels in cerebral arteries were measured. ePE had increased infarction compared with normal pregnant rats (P<0.05) that was reduced by aspirin (P<0.001). ePE also had intact cerebral blood flow autoregulation and reduced collateral perfusion during induced hypertension that was also prevented by aspirin. Aspirin increased prostacyclin in ePE (P<0.05) without reducing thromboxane B2, metabolite of thromboxane A2, or 8-isoprostane-prostaglandin-2α, a marker of lipid peroxidation. There were no differences in cyclooxygenase levels in cerebral arteries between groups.
    CONCLUSIONS: Low-dose aspirin in ePE reduced infarction that was associated with increased vasodilator prostacyclin and improved collateral perfusion during induced hypertension. The beneficial effect of aspirin on the brain and cerebral circulation is likely multifactorial and worth further study.
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