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cerebral hyperperfusion

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https://www.readbyqxmd.com/read/29107156/advantages-of-staged-angioplasty-in-a-patient-with-internal-carotid-artery-pseudo-occlusion-besides-prevention-of-cerebral-hyperperfusion-syndrome
#1
Satoshi Takahashi, Takenori Akiyama, Jin Nakahara, Takahito Yoshizaki, Norihiro Suzuki, Kazunari Yoshida
BACKGROUND: Staged angioplasty for carotid artery stenosis has been reported to be effective in preventing postoperative cerebral hyperperfusion syndrome (CHS) in patients with severe carotid stenosis; thus, it is also recommended for patients with internal carotid artery (ICA) pseudo-occlusion, the treatment strategy for which is controversial. CASE DESCRIPTION: This study reports the case of an Asian male in his 50s who suffered from motor aphasia and right-side weakness due to pseudo-occlusion of the left ICA...
October 26, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29046465/-usefulness-of-bilateral-rso-sub-2-sub-monitoring-for-predicting-cerebral-hyperperfusion-syndrome-after-carotid-artery-stenting
#2
Jun Niimi, Shoichiro Ishihara, Eisuke Tsukagoshi, Hiroaki Neki, Yoshiaki Kakehi, Nahoko Uemiya, Kouji Mizokami, Hideaki Ishihara, Shinya Kohyama, Fumitaka Yamane
OBJECTIVE: Cerebral hyperperfusion syndrome(CHS)and cerebral hyperperfusion phenomenon(CHP)induce intracranial hemorrhage and can become critical complications after carotid artery stenting(CAS). The purpose of the present study was to predict and avoid CHS after CAS using bilateral rSO<sub>2</sub> intraoperative monitoring. METHODS: We retrospectively analyzed 100 consecutive patients who underwent CAS between January 2012 and May 2014 in our institution...
October 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/29018652/anastomotic-aneurysm-formation-after-high-flow-bypass-surgery-a-case-report-with-histopathological-study
#3
Tatsuya Uchida, Masanori Yoshino, Shinji Ito, Takayuki Hara
Bypass surgery is often used in the treatment of large and giant aneurysms. Major complications that often arise during the perioperative period include cranial nerve palsy, ischemic complications, and hyperperfusion. However, there have been a few reports about late onset complications such as anastomotic aneurysms. In particular, anastomotic aneurysm after high flow bypasses has never been reported. A 57-year-old woman who had been suffering from left eye pain was diagnosed with a large aneurysm of the left internal carotid artery (ICA) in the cavernous portion...
October 2017: NMC Case Rep J
https://www.readbyqxmd.com/read/28994832/carotid-endarterectomy-for-treatment-of-carotid-in-stent-restenosis-long-term-follow-up-results-and-surgery-experiences-from-one-single-centre
#4
Le-Bao Yu, Wei Yan, Qian Zhang, Ji-Zong Zhao, Yan Zhang, Rong Wang, Jun-Shi Shao, Dong Zhang
OBJECTIVE: Few studies have reported the surgical treatment of carotid in-stent restenosis (ISR), more data and longer follow-up are needed. We describe the surgical treatment of ISR by standard carotid endarterectomy (CEA) with stent removal, including long-term follow-up in 10 patients from our centre. METHODS: Ten patients from our centre who underwent CEA with stent removal for ISR were retrospectively analysed, including nine symptomatic and one asymptomatic ISR of at least 70% with mean age 67...
September 2017: Stroke and Vascular Neurology
https://www.readbyqxmd.com/read/28991720/cerebral-hyperperfusion-syndrome-and-intracranial-hemorrhage-after-carotid-endarterectomy-or-carotid-stenting-a-meta-analysis
#5
REVIEW
George Galyfos, Argiri Sianou, Konstantinos Filis
INTRODUCTION: Cerebral hyperperfusion syndrome (CHS) and intracranial hemorrhage (ICH) after carotid revascularization have been associated with significant morbidity and mortality, although pooled data comparing these outcomes between open and endovascular treatment are lacking. Aim of this meta-analysis is to compare CHS and ICH risk between carotid endarterectomy (CEA) and carotid angioplasty with stenting (CAS). METHODS: A systematic literature review was conducted conforming to established criteria, in order to identify eligible articles published prior to February 2017...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28989169/moyamoya-disease-in-an-18-month-old-female-caucasian-complicated-by-cerebral-hyperperfusion-syndrome-following-indirect-revascularization
#6
James Murchison, John M Wilson, Coby Ray, Jessica Ginsberg, Laszlo Nagy
BACKGROUND Cerebral hyperperfusion syndrome is a rare complication of indirect revascularization due to moyamoya disease, but has not been reported previously in the pediatric population. We present a case of an 18-month-old girl with moyamoya disease that was treated with bilateral pial synangiosis and had complications consistent with cerebral hyperperfusion syndrome. This case report discusses the pathophysiological mechanisms involved in cerebral hyperperfusion in moyamoya syndrome. CASE REPORT An 18-month-old female Caucasian presented with seizures and weakness of the left side...
October 9, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28988884/cerebral-hyperperfusion-syndrome-an-unusual-but-disastrous-complication-of-carotid-recanalization-a-case-report
#7
Bahaadin Siroos, Mohammad Hossein Harirchian, Ali Kazemi Khaledi, Majid Ghaffarpour, Samad Golshani
Cerebral hyperperfusion syndrome (CHS), known as the dark side of carotid recanalization, happens in about 0%-3% of patients. Unfortunately, physicians involving in carotid recanalization generally are not aware of diagnostic and therapeutic aspects of this unusual but potentially life-threatening disorder. Severe bilateral carotid stenosis is suggested to predispose patients to CHS by decrement of cerebrovascular reactivity in a setting of chronic hypoperfusion state. We here introduced such a case; a 69-year-old man, a known case of hypertension and ischemic heart disease, who developed progressive intracranial hypertension underlying CHS after carotid stenting because of symptomatic severe bilateral carotid stenosis...
October 5, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28982786/preoperative-cerebral-oxygen-extraction-fraction-imaging-generated-from-7t-mr-quantitative-susceptibility-mapping-predicts-development-of-cerebral-hyperperfusion-following-carotid-endarterectomy
#8
J-I Nomura, I Uwano, M Sasaki, K Kudo, F Yamashita, K Ito, S Fujiwara, M Kobayashi, K Ogasawara
BACKGROUND AND PURPOSE: Preoperative hemodynamic impairment in the affected cerebral hemisphere is associated with the development of cerebral hyperperfusion following carotid endarterectomy. Cerebral oxygen extraction fraction images generated from 7T MR quantitative susceptibility mapping correlate with oxygen extraction fraction images on positron-emission tomography. The present study aimed to determine whether preoperative oxygen extraction fraction imaging generated from 7T MR quantitative susceptibility mapping could identify patients at risk for cerebral hyperperfusion following carotid endarterectomy...
October 5, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28972197/coherent-averaging-of-pseudorandom-binary-stimuli-is-the-dynamic-cerebral-autoregulatory-response-symmetrical
#9
Emmanuel Katsogridakis, David M Simpson, Glen Bush, Lingke Fan, Anthony A Birch, Robert Allen, John F Potter, Ronney B Panerai
Previous studies on cerebral autoregulation have shown the existence of hemispheric symmetry, which may be altered in stroke and traumatic brain injury. There is a paucity of data however on whether the response is symmetrical between those disturbances that cause cerebral hyperperfusion, to those that cause hypoperfusion. Our aim was to investigate whether the responses of cerebral autoregulation to haemodynamic stimuli of different directions are symmetrical. Approach: Using a previously described assessment method, we employed coherent averaging of the cerebral blood flow velocity (CBFV) responses to thigh cuff inflation and deflation, as driven by pseudorandom binary sequences, whilst simultaneously altering the inspired CO2...
October 3, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28962189/risk-factors-and-preventive-measures-of-cerebral-hyperperfusion-syndrome-after-carotid-artery-interventional-therapy
#10
Shibo Wang, Jing Han, Lei Cheng, Nengpeng Li
This study sought to investigate the risk factors for cerebral hyperperfusion syndrome (CHS) after carotid artery interventional therapy, and to explore potential preventive measures. Three hundred and eighty-two patients treated with carotid artery stenting at the Huanhu Hospital (Tianjin, China) between January 2010 and January 2016 were divided into CHS and non-CHS groups. A retrospective analysis of patient clinical data was made. The CHS group had more patients presenting coronary heart disease, diabetes, progressive neurological disease and transient recurrent cerebral hemorrhage than the non-CHS group...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28959477/staged-carotid-artery-angioplasty-and-stenting-for-patients-with-high-grade-carotid-stenosis-with-high-risk-of-developing-hyperperfusion-injury-a-retrospective-analysis-of-44-cases
#11
Dapeng Mo, Gang Luo, Bo Wang, Ning Ma, Feng Gao, Xuan Sun, Xiaotong Xu, Zhongrong Miao
BACKGROUND: Hyperperfusion syndrome (HPS) is a rare but potentially a life-threatening complication after carotid artery angioplasty and stenting (CAS). Staged CAS has been an alternative to prevent HPS. MATERIALS AND METHODS: 44 of 908 patients with high-grade internal carotid artery stenosis or near occlusion were at risk of HPS because of poor collateral flow and impaired cerebral blood flow (CBF). They were treated with first (stage 1), followed by a full CAS (stage 2) 1 month later...
December 2016: Stroke and Vascular Neurology
https://www.readbyqxmd.com/read/28943539/leptomeningeal-collaterals-strongly-correlate-with-reduced-cerebrovascular-reactivity-measured-by-acetazolamide-challenged-single-photon-emission-computed-tomography-using-a-stereotactic-extraction-estimation-analysis-in-patients-with-unilateral-internal-carotid
#12
Takenobu Kunieda, Kosuke Miyake, Hiroki Sakamoto, Yuko Iwasaki, Shin Iida, Satoshi Morise, Kengo Fujita, Masataka Nakamura, Satoshi Kaneko, Hirofumi Kusaka
Objective To assess the correlation between the angiographic appearance of cerebral collateral pathways or the degree of internal carotid artery stenosis (ICAS) and reduced cerebrovascular reactivity (CVR) estimated by single-photon emission computed tomography (SPECT) image analysis in patients with unilateral ICAS. Methods A retrospective analysis was performed in 42 patients with unilateral ICAS who underwent cerebral angiography and acetazolamide-challenged SPECT of the brain. Cerebral blood flow quantitation was performed using the quantitative SPECT/dual-table autoradiography method...
September 25, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28916863/intracerebral-hemorrhage-as-a-manifestation-of-cerebral-hyperperfusion-syndrome-after-carotid-revascularization-systematic-review-and-meta-analysis
#13
REVIEW
Pedro Abreu, Jerina Nogueira, Filipe Brogueira Rodrigues, Ana Nascimento, Mariana Carvalho, Ana Marreiros, Hipólito Nzwalo
BACKGROUND: Intracerebral hemorrhage (ICH) in the context of cerebral hyperperfusion syndrome (CHS) is an uncommon but potentially lethal complication after carotid revascularization for carotid occlusive disease. Information about its incidence, risk factors and fatality is scarce. Therefore, we aimed to perform a systematic review and meta-analysis focusing on the incidence, risk factors and outcomes of ICH in the context of CHS after carotid revascularization. METHODS: We searched the PubMed and EBSCO hosts for all studies published in English about CHS in the context of carotid revascularization...
September 15, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28866638/prediction-of-hyperperfusion-phenomenon-after-carotid-artery-stenting-and-carotid-angioplasty-using-quantitative-dsa-with-cerebral-circulation-time-imaging
#14
Keita Yamauchi, Yukiko Enomoto, Katharina Otani, Yusuke Egashira, Toru Iwama
BACKGROUND: Hyperperfusion syndrome after carotid interventions has a low incidence but it can lead to morbidity and mortality. OBJECTIVE: To evaluate the usefulness of quantitative DSA for predicting hyperperfusion phenomenon (HPP) after carotid artery stenting and angioplasty. METHODS: Thirty-three consecutive patients with carotid stenosis treated with carotid artery stenting or angioplasty between February 2014 and August 2016 were included...
September 2, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28836059/posterior-reversible-encephalopathy-syndrome-in-children-with-kidney-disease
#15
REVIEW
Cristina Gavrilovici, Ingrith Miron, Luminiţa Voroneanu, Silvia Bădărau, Magdalena Stârcea
Posterior reversible encephalopathy syndrome (PRES) has been described as a neurological condition observed in a variety of clinical settings and is characterized by focal neurological deficits, seizures, headaches, altered mental status, and visual impairment, associated with transient typical lesions on neuroimaging, predominantly in the posterior part of the brain. The most common risk factors for PRES are hypertension, renal diseases, and the use of calcineurin inhibitors. The incidence of PRES in children with renal disorders varies between 4 and 9%, according to different reports...
August 23, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28818254/medical-treatment-strategies-to-reduce-perioperative-morbidity-and-mortality-after-carotid-surgery
#16
REVIEW
A Ross Naylor
There is a paucity of high-quality evidence regarding what constitutes "optimal medical therapy" for the purposes of reducing morbidity/mortality after carotid endarterectomy (CEA). All patients should be prescribed antiplatelet therapy. Low-dose aspirin (75 to 325 mg) should be continued throughout the perioperative period and there is no evidence that higher doses confer additional benefit. There is emerging evidence that early implementation of dual antiplatelet therapy in recently symptomatic patients (aspirin 75 mg plus clopidogrel 75 mg) can reduce recurrent cerebral events before CEA and that dual antiplatelet therapy will significantly reduce stroke due to early postoperative carotid thrombosis...
March 2017: Seminars in Vascular Surgery
https://www.readbyqxmd.com/read/28742798/cerebrovascular-pressure-reactivity-monitoring-using-wavelet-analysis-in-traumatic-brain-injury-patients-a-retrospective-study
#17
COMPARATIVE STUDY
Xiuyun Liu, Joseph Donnelly, Marek Czosnyka, Marcel J H Aries, Ken Brady, Danilo Cardim, Chiara Robba, Manuel Cabeleira, Dong-Joo Kim, Christina Haubrich, Peter J Hutchinson, Peter Smielewski
BACKGROUND: After traumatic brain injury (TBI), the ability of cerebral vessels to appropriately react to changes in arterial blood pressure (pressure reactivity) is impaired, leaving patients vulnerable to cerebral hypo- or hyperperfusion. Although, the traditional pressure reactivity index (PRx) has demonstrated that impaired pressure reactivity is associated with poor patient outcome, PRx is sometimes erratic and may not be reliable in various clinical circumstances. Here, we introduce a more robust transform-based wavelet pressure reactivity index (wPRx) and compare its performance with the widely used traditional PRx across 3 areas: its stability and reliability in time, its ability to give an optimal cerebral perfusion pressure (CPPopt) recommendation, and its relationship with patient outcome...
July 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28737109/clinical-outcome-prediction-after-thrombectomy-of-proximal-middle-cerebral-artery-occlusions-by-the-appearance-of-lenticulostriate-arteries-on-magnetic-resonance-angiography-a-retrospective-analysis
#18
Johannes Kaesmacher, Kornelia Kreiser, Nathan W Manning, Alexandra S Gersing, Silke Wunderlich, Claus Zimmer, Justus F Kleine, Benedikt Wiestler, Tobias Boeckh-Behrens
Post-ischemic vasodynamic changes in infarcted brain parenchyma are common and range from hypo- to hyperperfusion. In the present study, appearance of the lenticulostriate arteries (LSAs) on postinterventional 3T time-of-flight (TOF)-MRA suggestive for altered post-stroke vasodynamics following thrombectomy was investigated. Patients who underwent thrombectomy for a proximal MCA occlusion and for whom postinterventional 3T TOF-MRA (median at day 3) was available, were included in this retrospective analysis (n=98)...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28704454/indocyanine-green-kinetics-with-near-infrared-spectroscopy-predicts-cerebral-hyperperfusion-syndrome-after-carotid-artery-stenting
#19
Ichiro Nakagawa, Hun Soo Park, Shohei Yokoyama, Shuichi Yamada, Yasushi Motoyama, Young Su Park, Takeshi Wada, Kimihiko Kichikawa, Hiroyuki Nakase
BACKGROUND: Cerebral hyperperfusion syndrome (HPS) is a potentially life-threatening complication following carotid artery stenting (CAS) and carotid endoarterectomy (CEA). Early prediction and treatment of patients at risk for HPS are required in patients undergoing CAS because HPS occurs significantly earlier after CAS than CEA. Near-infrared spectroscopy (NIRS) is often used for monitoring, and indocyanine green (ICG) kinetics by NIRS (ICG-NIRS) can detect reductions in cerebral perfusion in patients with acute stroke...
2017: PloS One
https://www.readbyqxmd.com/read/28701298/carotid-stenting-for-unilateral-stenosis-can-increase-contralateral-hemispheric-cerebral-blood-flow
#20
Akiyo Sadato, Shingo Maeda, Motoharu Hayakawa, Kazuhide Adachi, Hiroshi Toyama, Ichiro Nakahara, Yuichi Hirose
BACKGROUND: The revascularization of carotid stenosis can increase ipsilateral cerebral blood flow (CBF). Occasionally, elevated CBF is also evident on the contralateral side, but this phenomenon is poorly understood. OBJECTIVE: To analyze retrospectively the relationship between a contralateral CBF increase and several clinical and radiologic features. MATERIALS AND METHODS: We retrospectively analyzed 40 patients with unilateral cervical carotid stenosis treated by carotid artery stenting (CAS)...
July 12, 2017: Journal of Neurointerventional Surgery
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