keyword
MENU ▼
Read by QxMD icon Read
search

Mean cerebral blood flow

keyword
https://www.readbyqxmd.com/read/29133109/temporal-gradient-during-famous-face-naming-is-associated-with-lower-cerebral-blood-flow-and-gray-matter-volume-in-aging
#1
Chelsea C Hays, Zvinka Z Zlatar, Laura Campbell, M J Meloy, Christina E Wierenga
OBJECTIVE: Evidence suggests that famous face naming may be a cognitive ability especially sensitive to the early pathological processes of Alzheimer's disease (AD) and that those at risk for AD may demonstrate a Ribot temporal gradient (RTG), characterized by better performance for naming remote famous faces than for naming recent famous faces. Reductions in cerebral blood flow (CBF) and gray matter volume (GMV) have been implicated in the neuropathological cascade of AD and show utility as biomarkers of AD risk...
November 10, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/29132572/secondary-gains-advances-in-neurotrauma-management
#2
REVIEW
Brit Long, Alex Koyfman
Neurotrauma is a leading cause of death and is associated with many secondary injuries. A balance of mean arterial pressure (MAP) and intracranial pressure (ICP) is required to ensure adequate cerebral blood flow and cerebral perfusion pressure. Evaluation and management in the emergency department entails initial stabilization and resuscitation while assessing neurologic status. ICP management follows a tiered approach. Intubation requires consideration of preoxygenation, head of bed elevation, first pass success, and adequate analgesia and sedation...
February 2018: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/29131826/an-interactive-sports-video-game-as-an-intervention-for-rehabilitation-of-community-living-patients-with-schizophrenia-a-controlled-single-blind-crossover-study
#3
Nobuko Shimizu, Tomohiro Umemura, Masahiro Matsunaga, Takayoshi Hirai
Hypofrontality is a state of decreased cerebral blood flow in the prefrontal cortex during executive function performance; it is commonly observed in patients with schizophrenia. Cognitive dysfunction, as well as the psychological symptoms of schizophrenia, influences the ability of patients to reintegrate into society. The current study investigated the effects of an interactive sports video game (IVG; Nintendo Wii™ Sports Resort) on frontal lobe function of patients with schizophrenia. A sample of eight patients (6 male and 2 female; mean age = 46...
2017: PloS One
https://www.readbyqxmd.com/read/29130477/transcranial-doppler-and-lower-extremity-function-in-older-adults-einstein-aging-study
#4
Ali Ezzati, Tatjana Rundek, Joe Verghese, Carol A Derby
OBJECTIVES: To determine whether transcranial Doppler ultrasound (TCD) measures of mean blood flow velocity (MBFV) in the major cerebral arteries are associated with measures of lower extremity function in community-dwelling older adults. DESIGN: Cross-sectional study. SETTING: Community sample. PARTICIPANTS: Individuals aged 70 and older (mean 79.5, 54% female) without dementia participating in the Einstein Aging Study (N = 200)...
November 11, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29122537/a-coil-placement-technique-to-treat-intracranial-aneurysm-with-incorporated-artery
#5
Chao-Bao Luo, Feng-Chi Chang, Chung-Jung Lin, Wan-Yuo Guo
BACKGROUND: Endovascular coil embolization is an accepted treatment option for intracranial aneurysms. However, the coiling of aneurysms with an incorporated artery (IA) poses a high risk of IA occlusion. Here we report our experience of endovascular coil placement using a technique that avoids IA occlusion in aneurysms with IAs. METHODS: Over a 6-year period, 185 patients harboring 206 intracranial aneurysms underwent endosaccular coiling. Forty-two of these patients with 45 aneurysms were treated by coil placement to avoid IAs occlusion...
November 6, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29118793/feasibility-of-real-time-angiographic-perfusion-imaging-in-the-treatment-of-cerebral-vasospasm
#6
Christopher Donaldson, Anthea H O'Neill, Lee-Anne Slater, Winston Chong, Leon T Lai, Ronil V Chandra
Background: Objective assessment and quantification of the severity of cerebral vasospasm following aneurysmal subarachnoid hemorrhage is not routinely utilized. We investigated the feasibility of angiographic perfusion imaging derived from digital subtraction angiography (DSA) following endovascular vasospasm treatment procedures. Methodology: Real-time blood flow analysis was performed using parametric color coding on pre- and postintervention DSA. Semiquantitative parenchymal perfusion parameters (arrival time [AT] of contrast, time to peak [TTP] opacification, and mean transit time [MTT] of contrast) were calculated across 3 vascular territories (anterior cerebral artery [ACA], middle cerebral artery [MCA], and lenticulostriate arteries) using standard 2-D angiographic perfusion software...
October 2017: Interventional Neurology
https://www.readbyqxmd.com/read/29114921/association-of-early-left-ventricular-dysfunction-with-advanced-magnetic-resonance-white-matter-and-gray-matter-brain-measures-the-cardia-study
#7
Anderson C Armstrong, Majon Muller, Bharath Ambale-Ventakesh, Michael Halstead, Satoru Kishi, Nick Bryan, Stephen Sidney, Luís C L Correia, Samuel S Gidding, Lenore J Launer, João A C Lima
INTRODUCTION: Relations between heart failure and clinically manifested stroke are well known, but the associations between heart and brain early abnormalities are not totally clear. AIMS: We explore relations of subclinical brain abnormalities with early cardiac dysfunction in a large healthy middle-aged biracial cohort. METHODS: The CARDIA study enrolled 5115 young adults aged 18-30 years at baseline (1985-1986). We assessed 719 Caucasian and African American participants of the CARDIA study, with echocardiograms and brain MRI at follow-up year 25 (2010-2011)...
November 8, 2017: Echocardiography
https://www.readbyqxmd.com/read/29111992/cardiovascular-and-cerebral-hemodynamics-in-asymptomatic-healthy-subjects-with-without-abnormal-head-up-tilt-test-versus-recurrent-fainters
#8
Antonio González-Hermosillo, Manuel Sierra-Beltrán, Ulises López-Peña, Andrei Kostin, Guadalupe Hernández-Pacheco, Claudia Lerma
PURPOSE: The aim of this study was to compare hemodynamic and autonomic responses during head-up tilt test (HUTT) between healthy volunteers and patients with a history of fainting and confirmed vasovagal syncope. We hypothesize that the autonomic and hemodynamic physiologic responses remain intact during orthostatic stress in people without previous fainting and negative HUTT, but deteriorate similarly in patients with recurrent vasovagal syncope and in asymptomatic healthy subjects who develop a vasovagal response during HUTT...
October 27, 2017: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29103148/cerebrovascular-co2-reactivity-during-isoflurane-nitrous-oxide-anesthesia-in-patients-with-chronic-renal-failure
#9
Kazuyoshi Ishida, Masato Uchida, Kohji Utada, Atsuo Yamashita, Satoshi Yamashita, Shiro Fukuda, Mishiya Matsumoto, Takefumi Sakabe
PURPOSE: We assessed the cerebrovascular CO2 reactivity (CO2R) in chronic renal failure (CRF) patients without diabetes mellitus (DM), uncontrolled hypertension, peripheral vascular disease, or neurological disease under isoflurane-nitrous oxide anesthesia. METHODS: Forty-nine patients undergoing surgery, including 36 CRF patients (30 receiving dialysis and six pre-dialysis patients) and 13 patients without CRF (controls). Middle cerebral artery flow velocity (VMCA) was measured by transcranial Doppler ultrasonography at an end-tidal CO2 of 35 to 45 mmHg...
November 4, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/29097988/hyperbaric-oxygen-therapy-can-induce-angiogenesis-and-regeneration-of-nerve-fibers-in-traumatic-brain-injury-patients
#10
Sigal Tal, Amir Hadanny, Efrat Sasson, Gil Suzin, Shai Efrati
Background: Recent clinical studies in stroke and traumatic brain injury (TBI) victims suffering chronic neurological injury present evidence that hyperbaric oxygen therapy (HBOT) can induce neuroplasticity. Objective: To assess the neurotherapeutic effect of HBOT on prolonged post-concussion syndrome (PPCS) due to TBI, using brain microstructure imaging. Methods: Fifteen patients afflicted with PPCS were treated with 60 daily HBOT sessions. Imaging evaluation was performed using Dynamic Susceptibility Contrast-Enhanced (DSC) and Diffusion Tensor Imaging (DTI) MR sequences...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29095241/effects-of-cerebral-blood-flow-and-vessel-conditions-on-speech-recognition-in-patients-with-postlingual-adult-cochlear-implant-predictable-factors-for-the-efficacy-of-cochlear-implant
#11
Takashi Ishino, Mahmoud Ali Ragaee, Tatsuya Maruhashi, Masato Kajikawa, Yukihito Higashi, Toru Sonoyama, Sachio Takeno, Katsuhiro Hirakawa
OBJECTIVES: Cochlear implantation (CI) has been the most successful procedure for restoring hearing in a patient with severe and profound hearing loss. However, possibly owing to the variable brain functions of each patient, its performance and the associated patient satisfaction are widely variable. The authors hypothesize that peripheral and cerebral circulation can be assessed by noninvasive and globally available methods, yielding superior presurgical predictive factors of the performance of CI in adult patients with postlingual hearing loss who are scheduled to undergo CI...
October 31, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/29089671/role-of-whole-brain-computed-tomography-perfusion-in-head-injury-patients-to-predict-outcome
#12
T S Bindu, Sameer Vyas, Niranjan Khandelwal, Vikas Bhatia, Sivashanmugam Dhandapani, Ajay Kumar, Chirag K Ahuja
PURPOSE: To evaluate utility, pattern, and extent of perfusion abnormalities in traumatic brain injury by using whole-brain computed tomography perfusion (CTP) and to assess co-relation of CTP data clinically with Glasgow outcome score (GOS). MATERIALS AND METHODS: Prospective analytic evaluation of the traumatic head injury patients who were immediately taken up for CTP was done. Patient's demographic, clinical, and radiological findings were tabulated and analyzed...
July 2017: Indian Journal of Radiology & Imaging
https://www.readbyqxmd.com/read/29084064/new-insights-into-cerebral-small-vessel-disease-and-vascular-cognitive-impairment-from-mri
#13
Eric E Smith, Andrew E Beaudin
PURPOSE OF REVIEW: We review recent MRI research that addresses two important challenges in cerebral small vessel disease (SVD) research: early diagnosis, and linking SVD with cognitive impairment. First, we review studies of MRI measurements of blood flow and blood-brain barrier integrity. Second, we review MRI studies identifying neuroimaging correlates of SVD-related cognitive dysfunction, focusing on brain connectivity and white matter microarchitecture. This research is placed in context through discussion of recent recommendations for management of incidentally discovered SVD, and neuroimaging biomarker use in clinical trials...
October 27, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29082505/long-term-effect-of-intensive-lifestyle-intervention-on-cerebral-blood-flow
#14
Mark A Espeland, Jose A Luchsinger, Rebecca H Neiberg, Owen Carmichael, Paul J Laurienti, Xavier Pi-Sunyer, Rena R Wing, Delilah Cook, Edward Horton, Ramon Casanova, Kirk Erickson, R Nick Bryan
OBJECTIVES: To determine whether long-term behavioral intervention targeting weight loss through increased physical activity and reduced caloric intake would alter cerebral blood flow (CBF) in individuals with type 2 diabetes mellitus. DESIGN: Postrandomization assessment of CBF. SETTING: Action for Health in Diabetes multicenter randomized controlled clinical trial. PARTICIPANTS: Individuals with type 2 diabetes mellitus who were overweight or obese and aged 45 to 76 (N = 310)...
October 30, 2017: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29080274/low-dose-ct-perfusion-with-projection-view-sharing
#15
Thomas Martin, John Hoffman, Jeff R Alger, Michael McNitt-Gray, Danny Jj Wang
PURPOSE: CT Perfusion (CTP) is a widely used clinical imaging modality. However, CTP typically involves the use of substantial radiation dose (CTDIvol ≥~200mGy). The purpose of this study is to present a low dose CTP technique using a projection view-sharing reconstruction algorithm originally developed for dynamic MRI - "K-space Weighted Image Contrast" (KWIC). METHODS: The KWIC reconstruction is based on an angle bisection scheme. In KWIC, a Fourier transform was performed along each projection to form a "k-space" like CT data space, based on the central slice theorem...
October 27, 2017: Medical Physics
https://www.readbyqxmd.com/read/29075198/impacts-of-simulated-weightlessness-by-dry-immersion-on-optic-nerve-sheath-diameter-and-cerebral-autoregulation
#16
Marc Kermorgant, Florian Leca, Nathalie Nasr, Marc-Antoine Custaud, Thomas Geeraerts, Marek Czosnyka, Dina N Arvanitis, Jean-Michel Senard, Anne Pavy-Le Traon
Dry immersion (DI) is used to simulate weightlessness. We investigated in healthy volunteers if DI induces changes in ONSD, as a surrogate marker of intracranial pressure (ICP) and how these changes could affect cerebral autoregulation (CA). Changes in ICP were indirectly measured by changes in optic nerve sheath diameter (ONSD). 12 healthy male volunteers underwent 3 days of DI. ONSD was indirectly assessed by ocular ultrasonography. Cerebral blood flow velocity (CBFV) of the middle cerebral artery was gauged using transcranial Doppler ultrasonography...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29065769/imaging-of-cerebrovascular-function-in-chronic-traumatic-brain-injury
#17
Franck Amyot, Kimbra Kenney, Carol Moore, Maraglit Harber, L Christine Turtzo, Christian N Shenouda, Erika Silverman, Yunhua Gong, Bao-Xi Qu, Leah Harburg, Hangzang Lu, Eric Wassermann, Ramon Diaz-Arrastia
Traumatic cerebrovascular injury (TCVI) is a common pathologic mechanism of traumatic brain injury (TBI) and presents an attractive target for intervention. The aims of this study were to assess cerebral blood flow (CBF) and cerebrovascular reactivity (CVR) using magnetic resonance imaging (MRI), to assess their value as biomarkers of TCVI in chronic TBI, characterize the spatial distribution of TCVI, and assess the relationships between each biomarker and neuropsychological and clinical assessments. 42 subjects (27 chronic TBI, 15 age and gender-matched healthy volunteers) were studied cross-sectionally...
October 25, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29061152/individualized-perfusion-targets-in-hypoxic-ischemic-brain-injury-after-cardiac-arrest
#18
Mypinder S Sekhon, Donald E Griesdale
Secondary injury is a major determinant of outcome in hypoxic ischemic brain injury (HIBI) after cardiac arrest and may be mitigated by optimizing cerebral oxygen delivery (CDO2). CDO2 is determined by cerebral blood flow (CBF), which is dependent upon mean arterial pressure (MAP). In health, CBF remains constant over the MAP range through cerebral autoregulation. In HIBI, the zone of intact cerebral autoregulation is narrowed and varies for each patient. Maintaining MAP within the intact autoregulation zone may mitigate ischemia, hyperemia and secondary injury...
October 24, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29060775/correction-of-tissue-oxygen-saturations-using-arterial-oxygen-levels-for-cerebrovascular-autoregulation-analysis
#19
Andre Antunes, Dean Montgomery, Paul Addison, Ulf Borg
Adequate perfusion of blood is fundamental to brain tissue viability, and failure to appropriately regulate cerebral blood flow is related to neurological damage. Cerebral tissue oxygenation is commonly used as a surrogate of cerebral blood flow for non-invasive measures of autoregulation, but may only be valid during periods of constant oxygen delivery. We present a new algorithm to correct for supply oxygen-induced variations in cerebral tissue oxygenation, and we validate it by measuring the improved correlation of the corrected tissue oxygenation with blood flow...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060774/regression-based-noninvasive-estimation-of-intracranial-pressure
#20
Andrea Fanelli, Frederick W Vonberg, Rohan Jaishankar, Syed M Imaduddin, Robert C Tasker, Thomas Heldt
Monitoring of intracranial pressure (ICP) is indicated in patients with a variety of conditions affecting the brain and cerebrospinal fluid space. The measurement of ICP, however, is highly invasive as it requires placement of a catheter in the brain tissue or cerebral ventricular spaces. Several noninvasive techniques have been proposed to overcome this issue, and one class of approaches is based on analyzing cerebral blood flow velocity (CBFV) and arterial blood pressure (ABP) waveforms to infer ICP. Here, we analyze a physiologic model linking ICP to CBFV and ABP and present a regression-based approach to estimating ICP...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
keyword
keyword
64096
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"