keyword
MENU ▼
Read by QxMD icon Read
search

Hyperperfusion

keyword
https://www.readbyqxmd.com/read/28627790/regional-cerebral-blood-flow-in-opiate-dependence-relates-to-substance-use-and-neuropsychological-performance
#1
Donna E Murray, Timothy C Durazzo, Thomas P Schmidt, Troy A Murray, Christoph Abé, Joseph Guydish, Dieter J Meyerhoff
Neuroimaging of opiate-dependent individuals indicates both altered brain structure and function. Magnetic resonance-based arterial spin labeling has been used to measure noninvasively cerebral blood flow (i.e. perfusion) in alcohol, tobacco and stimulant dependence; only one arterial spin labeling paper in opiate-dependent individuals demonstrated frontal and parietal perfusion deficits. Additional research on regional brain perfusion in opiate dependence and its relationship to cognition and self-regulation (impulsivity, risk taking and decision making) may inform treatment approaches for opiate-dependent individuals...
June 19, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28605471/berlin-grading-system-can-stratify-the-onset-and-predict-perioperative-complications-in-adult-moyamoya-disease
#2
Daina Kashiwazaki, Naoki Akioka, Naoya Kuwayama, Kiyohiro Houkin, Marcus Czabanka, Peter Vajkoczy, Satoshi Kuroda
BACKGROUND: The grading system for moyamoya disease is not established. OBJECTIVE: To assess the usefulness of a recently proposed grading system for stratifying the clinical severity and predicting postoperative morbidity in adult moyamoya disease. METHODS: We investigated 176 hemispheres from 89 adult patients who were diagnosed with moyamoya disease in Japan. Their data were analyzed using the Berlin grading system with minor modifications...
June 10, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28600750/intra-operative-hemorrhage-due-to-hyperperfusion-during-direct-revascularization-surgery-in-an-adult-patient-with-moyamoya-disease-a-case-report
#3
Hiroki Uchida, Hidenori Endo, Miki Fujimura, Toshiki Endo, Kuniyasu Niizuma, Teiji Tominaga
Hemorrhagic complication is one of the notable surgical complications of the revascularization surgery for moyamoya disease (MMD). Cerebral hyperperfusion (CHP) has been considered as the underlying cause of this complication. It mostly occurs several days after surgery, but the intra-operative hemorrhage immediately after bypass has not been reported previously. A 21-year-old woman presented right thalamic hemorrhage and was diagnosed as having MMD by cerebral angiography. In light of the location of the hemorrhage at the vascular territory of posterior circulation and the manifestation of transient ischemic attack during the follow-up period, she underwent revascularization surgery to prevent future ischemic attack and rebleeding...
June 9, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28592064/-clinical-analysis-on-monitoring-and-comprehensive-treatment-after-carotid-endarterectomy
#4
X Y Wang, Z H Sun, L Liu, C Wu, Z Ji
Objective: To discuss the therapeutic effect of management of carotid endarterectomy in care unit. Methods: A total of 315 patients with carotid atherosclerotic stenosis were enrolled. All of the patients were taken into care unit under tracheal intubation anesthesia after carotid endarterectomy. Then the patients were managed with a breathing machine, continuous sedation, strict monitoring of hemodynamics and pupil change, strict control of heart rate and blood pressure, atomization inhalation therapy, treatment of anticoagulation and antiplatelet therapy and classification management of airway...
May 30, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28589655/cannulation-related-complications-on-veno-arterial-extracorporeal-membrane-oxygenation-prevalence-and-effect-on-mortality
#5
Joshua K Wong, Amber L Melvin, Devang J Joshi, Candice Y Lee, William J Archibald, Ron E Angona, Vakhtang Tchantchaleishvili, Howard T Massey, George L Hicks, Peter A Knight
Cannulation-related complications are a known source of morbidity in patients supported on veno-arterial extracorporeal membrane oxygenation (VA-ECMO). Despite its prevalence, little is known regarding the outcomes of patients who suffer such complications. This is a single institution review of cannulation-related complications and its effect on mortality in patients supported on VA-ECMO from January 2010-2015 using three cannulation strategies: axillary, femoral, and central. Complications were defined as advanced if they required major interventions (fasciotomy, amputation, site conversion)...
June 7, 2017: Artificial Organs
https://www.readbyqxmd.com/read/28582473/connectivity-in-ictal-single-photon-emission-computed-tomography-perfusion-a-cortico-cortical-evoked-potential-study
#6
Simon Tousseyn, Balu Krishnan, Zhong I Wang, Sattawut Wongwiangjunt, Chetan S Nayak, John C Mosher, Guiyun Wu, Wim Van Paesschen, Richard M Leahy, Jorge A Gonzalez-Martinez, Juan Bulacio, Imad M Najm, Andreas V Alexopoulos, Dileep R Nair
Subtraction ictal and interictal single photon emission computed tomography can demonstrate complex ictal perfusion patterns. Regions with ictal hyperperfusion are suggested to reflect seizure onset and propagation pathways. The significance of ictal hypoperfusion is not well understood. The aim of this study was to verify whether ictal perfusion changes, both hyper- and hypoperfusion, correspond to electrically connected brain networks. A total of 36 subtraction ictal and interictal perfusion studies were analysed in 31 consecutive medically refractory focal epilepsy patients, evaluated by stereo-electroencephalography that demonstrated a single focal onset...
June 3, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28573062/regional-cerebral-blood-flow-in-mild-cognitive-impairment-and-alzheimer-s-disease-measured-with-arterial-spin-labeling-magnetic-resonance-imaging
#7
REVIEW
Alba Sierra-Marcos
Alzheimer's disease (AD) depicts dynamic changes in regional brain function from early stages of the disease. Arterial spin labeling- (ASL-) based MRI methods have been applied for detecting regional cerebral blood flow (rCBF) perfusion changes in patients with AD and mild cognitive impairment (MCI). Nevertheless, the results obtained from ASL studies in AD and MCI are still controversial, since rCBF maps may show both hypoperfusion or hyperperfusion areas in brain structures involved in different cognitive functions...
2017: International Journal of Alzheimer's Disease
https://www.readbyqxmd.com/read/28573058/uncommon-etiology-for-seizure-cerebral-hyperperfusion-syndrome
#8
Mohankumar Kurukumbi, Ahn Truong, Naghemeh Pirsaharkhiz
Cerebral hyperperfusion syndrome (CHS) is a rare life-threatening complication of carotid endarterectomy (CEA) and carotid artery stenting (CAS) for carotid artery stenosis. The incidence varies between 0 and 3%, depending on the severity of the stenosis, perioperative hypertension, and contralateral carotid stenosis. This case report reports a 53-year-old female patient presenting with decreased alertness and multiple tonic-clonic seizures, in the background of bilateral CEA. She was found to have bilateral carotid stenosis...
2017: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/28553783/a-retrospective-cohort-analysis-of-percutaneous-versus-side-graft-perfusion-techniques-for-veno-arterial-extracorporeal-membrane-oxygenation-in-patients-with-refractory-cardiogenic-shock
#9
Mehmet Cakici, Evren Ozcinar, Cagdas Baran, Ahmet Onat Bermede, Mehmet Cahit Sarıcaoglu, Mustafa Bahadır Inan, Mustafa Serkan Durdu, Atilla Aral, Mustafa Sirlak, Ahmet Ruchan Akar
OBJECTIVES: This study was designed to compare vascular complications and the outcomes of ultrasound (US)-guided percutaneous cannulation with distal perfusion catheter (PC-DP) and arterial side-graft perfusion (SGP) techniques in patients who require veno-arterial extracorporeal membrane oxygenation (VA-ECMO) support for refractory cardiogenic shock (RCS). METHODS: We conducted a retrospective, observational cohort study of consequtive patients with RCS treated with VA-ECMO at a single transplant center from March 2010 until August 2015...
July 2017: Perfusion
https://www.readbyqxmd.com/read/28514814/-possibilities-and-limitations-of-oct-angiography-in-patients-with-central-serous-chorioretinopathy
#10
B Cakir, M Reich, S J Lang, A Bühler, A Stahl, D Böhringer, H Agostini, C Lange
Purpose Central serous chorioretinopathy (CSC) is a commonly acquired maculopathy characterized by the accumulation of subretinal fluid at the posterior pole. This study aims to analyze optical coherence tomography angiography (OCTA) findings in patients with acute and chronic CSC and to compare them to conventional imaging methods. Methods A series of 43 consecutive eyes of 29 patients diagnosed with CSC and 18 eyes of 9 healthy control subjects were included in this retrospective study. The OCTA images were assessed and compared to conventional fluorescence (FAG) and indocyanine green angiography (ICG)...
May 17, 2017: Klinische Monatsblätter Für Augenheilkunde
https://www.readbyqxmd.com/read/28498060/correlation-between-reduction-in-microvascular-transit-time-after-superficial-temporal-artery-middle-cerebral-artery-bypass-surgery-for-moyamoya-disease-and-the-development-of-postoperative-hyperperfusion-syndrome
#11
Tao Yang, Yoshifumi Higashino, Hiroharu Kataoka, Eika Hamano, Daisuke Maruyama, Koji Iihara, Jun C Takahashi
OBJECTIVE Hyperperfusion syndrome (HPS) is a notable complication that causes various neurological symptoms after superficial temporal artery (STA)-middle cerebral artery (MCA) bypass surgery for moyamoya disease (MMD). The authors used intraoperative indocyanine green (ICG) videoangiography to measure the change in microvascular transit time (MVTT) after bypass surgery. An analysis was then conducted to identify the correlation between change in MVTT and presence of postoperative HPS. METHODS This study included 105 hemispheres of 81 patients with MMD who underwent STA-MCA single bypass surgery between January 2010 and January 2015...
May 12, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28492488/redistribution-of-cerebral-blood-flow-during-severe-hypovolemia-and-reperfusion-in-a-sheep-model-critical-role-of-%C3%AE-1-adrenergic-signaling
#12
René Schiffner, Sabine Juliane Bischoff, Thomas Lehmann, Florian Rakers, Sven Rupprecht, Juliane Reiche, Georg Matziolis, Harald Schubert, Matthias Schwab, Otmar Huber, Martin Schmidt
BACKGROUND: Maintenance of brain circulation during shock is sufficient to prevent subcortical injury but the cerebral cortex is not spared. This suggests area-specific regulation of cerebral blood flow (CBF) during hemorrhage. METHODS: Cortical and subcortical CBF were continuously measured during blood loss (≤50%) and subsequent reperfusion using laser Doppler flowmetry. Blood gases, mean arterial blood pressure (MABP), heart rate and renal blood flow were also monitored...
May 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28489576/intraoperative-contrast-enhanced-ultrasonography-for-microcirculatory-evaluation-in-rhesus-monkey-with-spinal-cord-injury
#13
Lin Huang, Keng Chen, Fu-Chao Chen, Hui-Yong Shen, Ji-Chao Ye, Zhao-Peng Cai, Xi Lin
This study tried to quantify spinal cord perfusion by using contrast-enhanced ultrasound (CEUS) in rhesus monkey models with acute spinal cord injury. Acute spinal cord perfusion after injury was detected by CEUS, coupling with conventional ultrasound (US) and Color Doppler US (CDFI). Time-intensity curves and perfusion parameters were obtained by autotracking contrast quantification (ACQ) software in the epicenter and adjacent regions of injury, respectively. Neurological and histological examinations were performed to confirm the severity of injury...
June 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28475998/refractory-focal-motor-seizures-controlled-with-intramuscular-botulinum-toxin
#14
Wei-I Lee, Patrick W Carney, Andrew J Hughes, John S Archer
Patients with recurrent focal motor seizures present a management dilemma, as anti-convulsants are often ineffective, and resective surgery poses a high risk of motor deficit. We describe three patients with recurrent focal motor seizures that remained refractory despite numerous anti-convulsant trials. All patients showed either hyperperfusion on Single-Photon Emission Computerised Tomography (SPECT) or hypermetabolism on Positron Emission Tomography (PET) in primary motor cortex during periods of sustained jerking, although EEG abnormalities were uncommon...
July 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28458326/crossed-cerebellar-and-contralateral-thalamic-hyperperfusion-in-epilepsy
#15
Yuki Takane, Koichi Shibata, Yoshiko Nishimura, Hiroshi Sakura
No abstract text is available yet for this article.
2017: Internal Medicine
https://www.readbyqxmd.com/read/28458103/changes-in-the-interictal-and-early-postictal-diffusion-and-perfusion-magnetic-resonance-parameters-in-familial-spontaneous-epileptic-cats
#16
Yuji Hamamoto, Daisuke Hasegawa, Shunta Mizoguchi, Yoshihiko Yu, Masae Wada, Takayuki Kuwabara, Aki Fujiwara-Igarashi, Michio Fujita
OBJECTIVE: The familial spontaneous epileptic cat (FSEC) is thought to be a good genetic model of mesial temporal lobe epilepsy. In the current study, cerebral diffusion and perfusion magnetic resonance imaging (MRI) were used to confirm the functional deficit zone in the FSEC and evaluate the effect of a single seizure on different brain regions. METHODS: Six FSECs and six healthy control cats were used in this study. MRI was performed in the interictal state (resting state for control) and postictal state immediately after the vestibular stimulation-induced generalized epileptic seizure (control cats received the same stimulation as the FSECs)...
April 23, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/28445296/a-case-of-cerebral-hyperperfusion-following-spontaneous-recanalization-of-occluded-middle-cerebral-artery-reperfusion-injury-or-true-cerebral-hyperperfusion-syndrome
#17
Ziqi Xu, Jiajia Zhou, Hui Liang, Benyan Luo, Ping Liu
BACKGROUND: Cerebral hyperperfusion syndrome (CHS) and reperfusion injury are distinct pathological phenomena. CASE SUMMARY: We present the case of a young ischemic stroke patient with middle cerebral artery (MCA) occlusion and spontaneous recanalization. Follow-up transcranial Doppler ultrasound showed high velocity flow in the left MCA, and neuroimaging revealed infarction, brain edema, artery dilatation, and hyperperfusion, consistent with both CHS and reperfusion injury...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28430860/increased-brainstem-perfusion-but-no-blood-brain-barrier-disruption-during-attacks-of-migraine-with-aura
#18
Anders Hougaard, Faisal M Amin, Casper E Christensen, Samaira Younis, Frauke Wolfram, Stig P Cramer, Henrik B W Larsson, Messoud Ashina
See Moskowitz (doi:10.1093/brain/awx099) for a scientific commentary on this article.The migraine aura is characterized by transient focal cortical disturbances causing dramatic neurological symptoms that are usually followed by migraine headache. It is currently not understood how the aura symptoms are related to the headache phase of migraine. Animal studies suggest that cortical spreading depression, the likely mechanism of migraine aura, causes disruption of the blood-brain barrier and noxious stimulation of trigeminal afferents leading to activation of brainstem nuclei and triggering of migraine headache...
June 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28419949/characteristics-of-seizure-induced-signal-changes-on-mri-in-patients-with-first-seizures
#19
Si Eun Kim, Byung In Lee, Kyong Jin Shin, Sam Yeol Ha, JinSe Park, Kang Min Park, Hyung Chan Kim, Joonwon Lee, Soo-Young Bae, Dongah Lee, Sung Eun Kim
PURPOSE: The aim of this study was to investigate the predictive factors and identify the characteristics of the seizure-induced signal changes on MRI (SCM) in patients with first seizures. METHODS: We conducted a retrospective study of patients with first seizures from March 2010 to August 2014. The inclusion criteria for this study were patients with 1) first seizures, and 2) MRI and EEG performed within 24h of the first seizures. The definition of SCM was hyper-intensities in the brain not applying to cerebral arterial territories...
May 2017: Seizure: the Journal of the British Epilepsy Association
https://www.readbyqxmd.com/read/28409735/quantitative-magnetic-resonance-angiography-as-a-potential-predictor-for-cerebral-hyperperfusion-syndrome-a-preliminary-study
#20
Lukas Andereggen, Sepideh Amin-Hanjani, Marwan El-Koussy, Rajeev K Verma, Kenya Yuki, Daniel Schoeni, Kety Hsieh, Jan Gralla, Gerhard Schroth, Juergen Beck, Andreas Raabe, Marcel Arnold, Michael Reinert, Robert H Andres
OBJECTIVE Cerebral hyperperfusion syndrome (CHS) is a rare but devastating complication of carotid endarterectomy (CEA). This study sought to determine whether quantitative hemodynamic assessment using MR angiography can stratify CHS risk. METHODS In this prospective trial, patients with internal carotid artery (ICA) stenosis were randomly selected for pre- and postoperative quantitative phase-contrast MR angiography (QMRA). Assessment was standardized according to a protocol and included Doppler/duplex sonography, MRI, and/or CT angiography and QMRA of the intra- and extracranial supplying arteries of the brain...
April 14, 2017: Journal of Neurosurgery
keyword
keyword
91538
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"