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MCA İnfarction

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https://www.readbyqxmd.com/read/30322755/application-of-high-resolution-cube-sequence-in-exploring-stroke-mechanisms-of-atherosclerotic-stenosis-of-middle-cerebral-artery
#1
Jianye Liang, Jun Guo, Dexiang Liu, Changzheng Shi, Liangping Luo
BACKGROUND: This study aimed to analyze the vascular wall and atherosclerotic plaques of the middle cerebral artery (MCA) and compare their differences between patients with cerebral infarction and transient ischemic attack (TIA) using 3-dimensional fast-spin-echo T1-weighted sequence (namely CUBE). METHODS: Forty-seven patients with atherosclerotic stenosis of the MCA were included in this study. They received magnetic resonance examinations with routine T1WI, T2WI, 3-dimensional time-of-flight magnetic resonance angiography and diffusion-weighted imaging, as well as high-resolution CUBE T1WI sequence...
October 13, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/30311865/keyhole-approaches-for-surgical-treatment-of-intracranial-aneurysms-a-short-review
#2
Jonathan Rychen, Davide Croci, Michel Roethlisberger, Erez Nossek, Matthew B Potts, Ivan Radovanovic, Howard A Riina, Luigi Mariani, Raphael Guzman, Daniel W Zumofen
OBJECTIVE: To clarify the reported experience with keyhole approaches for the treatment of intracranial aneurysms. METHODS: The PubMed and Embase databases were searched up to December 2017 for full-text publications that report the treatment of aneurysms with the eyebrow variant of the supraorbital craniotomy (SOC), the minipterional craniotomy, or the eyelid variant of the SOC. The anatomical distribution of aneurysms, the postoperative aneurysm occlusion rate, and the type and rate of complications were examined using univariate analysis...
October 12, 2018: Neurological Research
https://www.readbyqxmd.com/read/30294295/different-mechanisms-of-two-subtypes-of-perforating-artery-infarct-in-the-middle-cerebral-artery-territory-a-high-resolution-magnetic-resonance-imaging-study
#3
Siyuan Liao, Zhezhi Deng, Yuge Wang, Ting Jiang, Zhuang Kang, Sha Tan, Yilong Shan, Yan Zou, Zhengqi Lu
Purpose: Perforating Artery Infarcts (PAIs) can be divided into two subtypes based on their etiologies: branch Atheromatous Disease (BAD) and Lacunar Infarct (LI). Recent studies have shown that while both subtypes can be caused by large artery lesions, the different mechanisms that underlie their development are not clear. This study was designed to use High-Resolution Magnetic Resonance Imaging (HRMRI) to explore the differences that contribute to the occurrence of these two subtypes in large artery lesions in the anterior circulation...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/30288900/decompressive-hemicraniectomy-after-malignant-middle-cerebral-artery-infarction-does-hospital-of-origin-matter
#4
Duncan Smyth, Mark Weatherall, Ian Rosemergy, Kelvin Woon, Jeremy Lanford
Decompressive hemicraniectomy (DHC) has been shown to reduce mortality in malignant middle cerebral artery (MCA) infarction. Our primary objective was to compare 1-year mortality between patients receiving DHC for malignant MCA infarction at our institution based on hospital of origin. We retrospectively reviewed the medical records of all patients treated for malignant MCA infarction with DHC at our institution over a 3-year period. One-year mortality rates and time to surgery were comparable regardless of whether the patient first attended the tertiary referral centre or a peripheral centre...
October 2018: Internal Medicine Journal
https://www.readbyqxmd.com/read/30264158/mapping-the-supratentorial-cerebral-arterial-territories-using-1160-large-artery-infarcts
#5
Dong-Eog Kim, Jong-Ho Park, Dawid Schellingerhout, Wi-Sun Ryu, Su-Kyoung Lee, Min Uk Jang, Sang-Wuk Jeong, Jeong-Yong Na, Jung E Park, Eun Ja Lee, Ki-Hyun Cho, Joon-Tae Kim, Beom Joon Kim, Moon-Ku Han, Jun Lee, Jae-Kwan Cha, Dae-Hyun Kim, Soo Joo Lee, Youngchai Ko, Byung-Chul Lee, Kyung-Ho Yu, Mi Sun Oh, Keun-Sik Hong, Yong-Jin Cho, Jong-Moo Park, Kyusik Kang, Tai Hwan Park, Kyung Bok Lee, Kyoung-Jong Park, Heung-Kook Choi, Juneyoung Lee, Hee-Joon Bae
Importance: Cerebral vascular territories are of key clinical importance in patients with stroke, but available maps are highly variable and based on prior studies with small sample sizes. Objective: To update and improve the state of knowledge on the supratentorial vascular supply to the brain by using the natural experiment of large artery infarcts and to map out the variable anatomy of the anterior, middle, and posterior cerebral artery (ACA, MCA, and PCA) territories...
September 24, 2018: JAMA Neurology
https://www.readbyqxmd.com/read/30261392/selective-brain-hypothermia-augmenting-neuroprotective-effects-of-decompressive-craniectomy-for-permanent-middle-cerebral-artery-infarction-in-a-rat-model
#6
Jaechan Park, Jong-Heon Kim, Kyoungho Suk, Hyung Soo Han, Boram Ohk, Dong Gyu Kim
OBJECTIVE: This study attempted to evaluate the combined effects of a decompressive craniectomy and prolonged selective brain hypothermia on large hemispheric infarction in a rat model. METHODS: Permanent middle cerebral artery (MCA) infarction using an endovascular occlusion technique was created in the rats assigned to 4 groups. Normothermia was maintained without a craniectomy in group A (n = 20) as the control, prolonged (> 44 hours), selective brain hypothermic treatment was performed on group B (n = 20), a craniectomy was performed on group C (n = 18), and prolonged, selective brain hypothermic treatment using a cooling coil implanted in the craniectomy site was combined with a craniectomy for group D (n = 18)...
September 24, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/30258353/dickkopf-3-causes-neuroprotection-by-inducing-vascular-endothelial-growth-factor
#7
Carla Letizia Busceti, Luisa Di Menna, Franca Bianchi, Federica Mastroiacovo, Paola Di Pietro, Anna Traficante, Giovanna Bozza, Christof Niehrs, Giuseppe Battaglia, Valeria Bruno, Francesco Fornai, Massimo Volpe, Speranza Rubattu, Ferdinando Nicoletti
Dickkopf-3 (Dkk3) is an atypical member of the Dkk family of Wnt inhibitors, which has been implicated in the pathophysiology of neurodegenerative disorders. However, the role of Dkk3 in mechanisms of cell degeneration and protection is unknown. We used Dkk3 knockout mice to examine how endogenous Dkk3 influences ischemic brain damage. In addition, we used primary cultures of astrocytes or mixed cultures of astrocytes and neurons to investigate the action of Dkk3 on cell damage and dissect the underlying molecular mechanisms...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/30254443/investigation-of-ischemic-and-demyelinating-lesions-by-cerebral-vasoreactivity-based-on-transcranial-doppler-sonography-a-comparative-study
#8
Anahita Zoghi, Peyman Petramfar, Alireza Nikseresht, Ehsan Sakhaee
Purpose: Variations of cerebral blood flow in response to hypoxia and hyperoxia in different disease conditions can provide new insights into disease etiopathogenesis. This study aimed to determine the characteristics of cerebral vasoreactivity for ischemia and demyelination. Materials and methods: This case-control study included: 28 patients with lacunar infarctions verified by history, physical examination, and MRI; 28 age- and sex-matched healthy controls; 28 patients with relapsing-remitting multiple sclerosis (MS), based on McDonald criteria; and 28 age- and sex-matched healthy controls for the MS group...
2018: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/30219336/assessment-of-collateral-blood-flow-in-patients-with-distal-branch-occlusion-of-the-middle-cerebral-artery
#9
Boehme J, Wenz H, Al-Zghloul M, Alonso A, Groden C, Förster A
PURPOSE: Aim of this study was to evaluate the collateral blood flow between more distal branches of the middle cerebral artery (MCA) in the case of peripheral MCA branch occlusion on dynamic 4D angiograms. We sought to individually predict the finally resulting infarction volume with regard to the extent of collateral blood flow. METHODS: Overall, 35 acute ischemic stroke patients with peripheral MCA branch occlusion were included. Volumes of the ischemic infarctions and perfusion deficits were measured on diffusion weighted images DWI and time-to-peak TTP (>4S)...
September 13, 2018: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/30196680/contact-aspiration-versus-stent-retriever-thrombectomy-for-distal-middle-cerebral-artery-occlusions-in-acute-ischemic-stroke-meta-analysis
#10
Kevin Phan, Julian Maingard, Hong Kuan Kok, Adam A Dmytriw, Sourabh Goyal, Ronil Chandra, Duncan Mark Brooks, Vincent Thijs, Hamed Asadi
PURPOSE: The evidence for endovascular therapy and choice of technique in distal middle cerebral artery (MCA) M2 segment occlusions in acute ischemic stroke remains controversial. We aimed to conduct a systematic review and meta-analysis primarily comparing reperfusion rates of stent-retrieval versus contact aspiration for M2 occlusions. MATERIALS AND METHODS: Study selection included cohorts of patients with distal MCA occlusions in acute ischemic strokes treated with an endovascular approach including stent-retrieval or contact aspiration...
September 2018: Neurointervention
https://www.readbyqxmd.com/read/30194110/crossing-y-solitaire-thrombectomy-as-a-rescue-treatment-for-refractory-acute-occlusions-of-the-middle-cerebral-artery
#11
Kubilay Aydin, Mehmet Barburoglu, Ozgur Oztop Cakmak, Nilufer Yesilot, Ebru Nur Yavuz Vanli, Sergin Akpek
BACKGROUND: Mechanical thrombectomy using a stent retriever has become the standard of care for acute large-vessel occlusions in the anterior circulation. Clots that are refractory to single stent retriever thrombectomy remain a challenge for neurointerventionalists. OBJECTIVE: To assess the efficacy and safety of double stent retriever (crossing Y-Solitaire) thrombectomy as a rescue treatment for acute middle cerebral artery (MCA) occlusions that are refractory to single stent retriever thrombectomy...
September 7, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/30157965/control-of-occlusion-of-middle-cerebral-artery-in-perinatal-and-neonatal-mice-with-magnetic-force
#12
Jie-Min Jia, Chuanqi Peng, Yihui Wang, Jie Zheng, Woo-Ping Ge
Ischemic perinatal stroke (IPS) is common, resulting in significant mortality and morbidity. In such cases, the incidence of unilateral arterial cerebral infarction is often occluded in the middle cerebral artery (MCA), leading to focal ischemia. In adult rodents, blockage of MCA is the most frequently used strategy for ischemic stroke study. However, modeling MCA occlusion (MCAo) in postnatal day 0-7 (P0-7) mouse pups for IPS study has not been accomplished. Here we occluded the dMCA by inducing the accumulation of magnetic particles (MPs) administered through the superficial temporal vein of mice between P0 and P7, which we called neonatal or perinatal SIMPLE (Stroke Induced with Magnetic Particles)...
August 29, 2018: Molecular Brain
https://www.readbyqxmd.com/read/30145026/middle-cerebral-artery-atherosclerosis-and-deep-subcortical-infarction-a-3t-magnetic-resonance-vessel-wall-imaging-study
#13
Mi Shen, Peiyi Gao, Qian Zhang, Lina Jing, Hongyi Yan, Hao Li
BACKGROUND: Deep subcortical infarction is a major subtype of stroke in middle cerebral artery (MCA) territory. This study aims to evaluate the relationship between characteristics of MCA plaque and features of deep subcortical infarction. METHODS: Patients with recent acute ischemic stroke and deep subcortical infarction were prospectively enrolled. Both multicontrast brain sequences and 3D high-resolution vessel wall imaging (VWI) sequences were scanned for all patients...
November 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/30135281/-study-of-the-neuroprotective-effects-of-carnosine-in-an-experimental-model-of-focal-cerebral-ischemia-reperfusion
#14
A A Devyatov, T N Fedorova, S L Stvolinsky, I N Ryzhkov, N A Riger, V A Tutelyan
Oxidative stress is one of the key factors in brain tissue damage in ischemia, which indicates the appropriateness of using antioxidants under these conditions. One of the promising antioxidants for the therapy of ischemic stroke is the natural dipeptide carnosine. The neuroprotective effect of dietary carnosine administration was investigated in an experimental model of focal cerebral ischemia/reperfusion in Wistar rats. Animals received carnosine with a diet at a daily dose of 150 mg/kg for 7 days before temporary occlusion of the middle cerebral artery (MCA), performed for 60 min...
August 2018: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/30130971/maximum-lesions-area-and-orthogonal-values-accessed-from-dwi-images-would-be-alternative-imaging-markers-for-predicting-the-outcome-of-acute-ischemia-in-the-middle-cerebral-artery-territory
#15
Tao Yuan, Guoli Ren, Guanmin Quan, Yawu Liu
Background Evaluating the acute ischemic volume on diffusion-weighted imaging (DWI) in the middle cerebral artery (MCA) territory would predict outcome. Purpose To investigate the correlations between maximum area with restricted diffusion (MaxA), the orthogonal diameters (OD) as well as lesion volume on DWI, and to explore the role of MaxA and OD on predicting unfavorable outcome after an acute MCA ischemic stroke. Material and Methods Sixty consecutive adult patients, including modified Rankin Scale score (mRS) ≤2 (n = 31) and mRS > 2 (n = 29) groups, were retrospectively enrolled...
August 21, 2018: Acta Radiologica
https://www.readbyqxmd.com/read/30093929/bilateral-hyperdense-middle-cerebral-arteries-stroke-sign-or-not
#16
James Vogler, Veer Gariwala, Anthony Trace, Victor Fong, John Plemmons
Hyperdense middle cerebral artery (MCA) is a classic sign of acute thromboembolic disease. Simultaneous bilateral occurrence is uncommon and traditionally attributed to physiological hemoconcentration or attributable to imaging artifact. We present the case of a 71-year-old man whose admission noncontrast computed tomography (CT) demonstrated bilateral hyperdense middle cerebral arteries without other radiographic evidence of acute stroke. CT angiography confirmed bilateral MCA, M1 segment vascular occlusion and follow-up noncontrast CT demonstrated MCA territory infarctions...
October 2018: Radiology Case Reports
https://www.readbyqxmd.com/read/30088068/significance-of-hyperintense-arteries-on-gd-enhanced-3d-t1w-black-blood-imaging-in-acute-stroke
#17
Kyung-Yul Lee, Sang Hyun Suh, Sung Jun Ahn
OBJECTIVES: To elucidate the pathogenesis of hyperintense arteries on Gd-enhanced 3D T1W BB FSE and their clinical significance in acute middle cerebral artery (MCA) stroke. METHODS: We retrospectively reviewed 20 patients with MCA infarction. We measured the contrast-to-noise ratio between hyperintense artery and adjacent grey matter on T2-FLAIR and Gd-enhanced 3D T1W BB FSE and compared them by using Student's t test. The agreement of positive hyperintense artery between T2 FLAIR and Gd-enhanced 3D T1WI BB FSE was estimated with intraclass correlation coefficient...
August 7, 2018: European Radiology
https://www.readbyqxmd.com/read/30029514/comparison-of-the-effect-of-melatonin-treatment-before-and-after-brain-ischemic-injury-in-the-inflammatory-and-apoptotic-response-in-aged-rats
#18
Lisa Rancan, Sergio D Paredes, Cruz García, Pablo González, Cruz Rodríguez-Bobada, Mario Calvo-Soto, Bryan Hyacinthe, Elena Vara, Jesús A F Tresguerres
Aging is associated with an increase in stroke risk. Melatonin, a potent free radical scavenger and broad spectrum antioxidant, has been shown to counteract inflammation and apoptosis in brain injury. However, little is known on the possible protective effects of melatonin in aged individuals affected by brain ischemia. Also, using melatonin before or after an ischemic stroke may result in significantly different molecular outcomes. The objective of the present study was to compare the effects of pre-ischemia vs...
July 19, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30026864/ccr2-dependent-monocytes-macrophages-exacerbate-acute-brain-injury-but-promote-functional-recovery-after-ischemic-stroke-in-mice
#19
Weirong Fang, Xuan Zhai, Dong Han, Xiaoxing Xiong, Tao Wang, Xun Zeng, Shucheng He, Rui Liu, Masaaki Miyata, Baohui Xu, Heng Zhao
Rationale: Peripheral blood monocytes are recruited into the ischemic brain and transform into macrophages after stroke. Nevertheless, the exact role of CCR2-dependent monocytes/macrophages in brain injury after stroke remains elusive. Methods: We used CCR2 knockout (KO) mice and the CCR2 pharmacological inhibitor, propagermanium (PG), to address the role of CCR2-dependent monocytes/macrophages in the acute stage and neurological functional recovery after middle cerebral artery (MCA) occlusion and reperfusion...
2018: Theranostics
https://www.readbyqxmd.com/read/30010073/feasibility-and-midterm-outcomes-of-endovascular-coil-embolization-of-an-unruptured-middle-cerebral-artery-aneurysm-with-an-incorporated-branch
#20
Jonghoon Kim, Chulhoon Chang, Youngjin Jung
BACKGROUND: Endovascular coiling has emerged as an option for the management of unruptured intracranial aneurysms, which was traditionally treated via surgical clipping. Unlike aneurysms elsewhere, aneurysms of the middle cerebral artery (MCA) have several features that are favorable for surgery. However, endovascular treatment can be difficult for MCA aneurysms, especially if they have incorporated branches. We report the results of coil embolization of incorporated MCA aneurysms. METHODS: From 2012 to 2017, 129 unruptured aneurysms including 10 incorporated MCA aneurysms were treated...
October 2018: World Neurosurgery
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