keyword
MENU ▼
Read by QxMD icon Read
search

cerebral perfusion

keyword
https://www.readbyqxmd.com/read/28929251/risk-reduction-of-long-term-major-adverse-cardiovascular-events-after-endoscopic-thoracic-sympathectomy-in-palmar-hyperhidrosis
#1
Chun-An Cheng, Chun-Gu Cheng, Hsin Chu, Hung-Che Lin, Chi-Hsiang Chung, Hung-Wen Chiu, Wu-Chien Chien
PURPOSE: Palmar hyperhidrosis (PH) is excessive sweating of the palms resulting from sympathetic overactivity, and patients who undergo endoscopic thoracic sympathectomy (ETS) show reduced cardiac demand after 1 year and improved cerebral perfusion within 2-4 weeks. However, the long-term risks of major adverse cardiovascular events (MACE) following ETS remain unclear. METHODS: We searched the Longitudinal National Health Insurance Database in Taiwan and identified PH patients (International Classification of Disease, Ninth Revision, Clinical Modification diagnostic code 708...
September 19, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28926646/vascular-hypoperfusion-in-acute-optic-neuritis-is-a-potentially-new-neurovascular-model-for-demyelinating-diseases
#2
Ta-Ching Chen, Chao-Yuan Yeh, Chao-Wen Lin, Chung-May Yang, Chang-Hao Yang, I-Hung Lin, Pao-Yang Chen, Jung-Yu Cheng, Fung-Rong Hu
PURPOSE: Optic neuritis is highly correlated with multiple sclerosis and is a major cause of acute visual loss and long-term neuronal degeneration. Primary cerebral hypoperfusion has been reported in brain demyelinating diseases. This study investigated whether peripapillary perfusion is changed in patients with acute optic neuritis (AON). METHODS: This three-year cohort study was conducted from September 1 2012, to August 31, 2015. Two hundred and forty-one patients with non-glaucomatous acute optic neuropathy were screened, and 42 non-highly myopic patients who had suffered their first episode of unilaterally idiopathic AON were studied...
2017: PloS One
https://www.readbyqxmd.com/read/28925731/detection-of-metabolic-pattern-following-decompressive-craniectomy-in-severe-traumatic-brain-injury-a-microdialysis-study
#3
Deepak Gupta, Raghav Singla, Anna T Mazzeo, Eric B Schnieder, Vivek Tandon, S S Kale, A K Mahapatra
OBJECTIVE: The aim of the study was to detect mitochondrial dysfunction and ischaemia in severe traumatic brain injury and their relationship with outcome. METHODS: Forty-one patients with severe traumatic brain injury (TBI) who underwent decompressive craniectomy were prospectively monitored with intracerebral microdialysis catheters (MD). Variables related to energy metabolism were studied using microdialysis. RESULTS: Twentysix patients (63...
September 19, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28924181/common-and-dissociable-regional-cerebral-blood-flow-differences-associate-with-dimensions-of-psychopathology-across-categorical-diagnoses
#4
A N Kaczkurkin, T M Moore, M E Calkins, R Ciric, J A Detre, M A Elliott, E B Foa, A Garcia de la Garza, D R Roalf, A Rosen, K Ruparel, R T Shinohara, C H Xia, D H Wolf, R E Gur, R C Gur, T D Satterthwaite
The high comorbidity among neuropsychiatric disorders suggests a possible common neurobiological phenotype. Resting-state regional cerebral blood flow (CBF) can be measured noninvasively with magnetic resonance imaging (MRI) and abnormalities in regional CBF are present in many neuropsychiatric disorders. Regional CBF may also provide a useful biological marker across different types of psychopathology. To investigate CBF changes common across psychiatric disorders, we capitalized upon a sample of 1042 youths (ages 11-23 years) who completed cross-sectional imaging as part of the Philadelphia Neurodevelopmental Cohort...
September 19, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/28923139/cerebral-hemodynamics-and-executive-function-during-exercise-and-recovery-in-normobaric-hypoxia
#5
Jon Stavres, Hayden D Gerhart, Jung-Hyun Kim, Ellen L Glickman, Yongsuk Seo
BACKGROUND: Hypoxia and exercise each exhibit opposing effects on executive function, and the mechanisms for this are not entirely clear. This study examined the influence of cerebral oxygenation and perfusion on executive function during exercise and recovery in normobaric hypoxia (NH) and normoxia (N). METHODS: There were 18 subjects who completed cycling trials in NH (12.5% FIo2) and N (20.93% FIo2). Right prefrontal cortex (PFC) oxyhemoglobin (O2Hb) and middle cerebral artery blood velocity (MCAbv) were collected during executive function challenges [mathematical processing and running memory continuous performance task (RMCPT)] at baseline, following 30 min of acclimation, during 20 min of cycling (60% Vo2max), and at 1, 15, 30, and 45 min following exercise...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28922885/patient-selection-and-clinical-efficacy-of-urgent-superficial-temporal-artery-middle-cerebral-artery-bypass-in-acute-ischemic-stroke-using-advanced-magnetic-resonance-imaging-techniques
#6
Hyun-Seok Park, Sang-Hyeon Kim, Hyun-Wook Nah, Jae-Hyung Choi, Dae-Hyun Kim, Myong-Jin Kang, Jae-Kwan Cha, Jae-Taeck Huh
BACKGROUND: Selected patients with acute ischemic stroke might benefit from superficial temporal artery-middle cerebral artery (STA-MCA) bypass, but the indications for urgent STA-MCA bypass are unknown. OBJECTIVE: To report our experiences of urgent STA-MCA bypass in patients requiring urgent reperfusion who were ineligible for other reperfusion therapies, using advanced magnetic resonance imaging (MRI) techniques. METHODS: The inclusion criteria for urgent STA-MCA bypass were as follows: acute infarct volume <70 mL with a ratio of perfusion/diffusion lesion volume ≥1...
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28916637/effect-of-increases-in-cardiac-contractility-on-cerebral-blood-flow-in-humans
#7
Shigehiko Ogoh, Gilbert Moralez, Takuro Washio, Satyam Sarma, Michinari Hieda, Steven A Romero, Matthew N Cramer, Manabu Shibasaki, Craig G Crandall
The effect of acute increases in cardiac contractility on cerebral blood flow (CBF) remains unknown. We hypothesized that the external carotid artery (ECA) downstream vasculature modifies the direct influence of acute increases in heart rate and cardiac function on CBF regulation. Twelve healthy subjects received two infusions of dobutamine (first a low dose; 5 μg/kg/min and then a high dose; 15 μg/kg/min) for 12 min each. Cardiac output, blood flow through the internal carotid artery (ICA) and ECA and echocardiographic measurements were performed during dobutamine infusions...
September 15, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28913838/simultaneous-acquisition-of-perfusion-image-and-dynamic-mr-angiography-using-time-encoded-pseudo-continuous-asl
#8
Yuriko Suzuki, Michael Helle, Peter Koken, Marc Van Cauteren, Matthias J P van Osch
PURPOSE: Both dynamic magnetic resonance angiography (4D-MRA) and perfusion imaging can be acquired by using arterial spin labeling (ASL). While 4D-MRA highlights large vessel pathology, such as stenosis or collateral blood flow patterns, perfusion imaging provides information on the microvascular status. Therefore, a complete picture of the cerebral hemodynamic condition could be obtained by combining the two techniques. Here, we propose a novel technique for simultaneous acquisition of 4D-MRA and perfusion imaging using time-encoded pseudo-continuous arterial spin labeling...
September 14, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28913751/emergency-neurological-life-support-airway-ventilation-and-sedation
#9
Venkatakrishna Rajajee, Becky Riggs, David B Seder
Airway management and ventilation are central to the resuscitation of the neurologically ill. These patients often have evolving processes that threaten the airway and adequate ventilation. Furthermore, intubation, ventilation, and sedative choices directly affect brain perfusion. Therefore, Airway, Ventilation, and Sedation was chosen as an Emergency Neurological Life Support protocol. Topics include airway management, when and how to intubate with special attention to hemodynamics and preservation of cerebral blood flow, mechanical ventilation settings and the use of sedative agents based on the patient's neurological status...
September 14, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/28912128/aging-modifies-the-effect-of-cardiac-output-on-middle-cerebral-artery-blood-flow-velocity
#10
Anne-Sophie G T Bronzwaer, Jasper Verbree, Wim J Stok, Mat J A P Daemen, Mark A van Buchem, Matthias J P van Osch, Johannes J van Lieshout
An association between cerebral blood flow (CBF) and cardiac output (CO) has been established in young healthy subjects. As of yet it is unclear how this association evolves over the life span. To that purpose, we continuously recorded mean arterial pressure (MAP; finger plethysmography), CO (pulse contour; CO-trek), mean blood flow velocity in the middle cerebral artery (MCAV; transcranial Doppler ultrasonography), and end-tidal CO2 partial pressure (PetCO2) in healthy young (19-27 years), middle-aged (51-61 years), and elderly subjects (70-79 years)...
September 2017: Physiological Reports
https://www.readbyqxmd.com/read/28905995/leptomeningeal-collateral-status-predicts-outcome-after-middle-cerebral-artery-occlusion
#11
C F Madelung, C Ovesen, C Trampedach, A Christensen, I Havsteen, C K Hansen, H Christensen
OBJECTIVES: Perfusion through leptomeningeal collateral vessels is a likely pivotal factor in the outcome of stroke patients. We aimed to investigate the effect of collateral status on outcome in a cohort of unselected, consecutive stroke patients with middle cerebral artery occlusion undergoing reperfusion therapy. MATERIALS AND METHODS: This retrospectively planned analysis was passed on prospectively collected data from 187 consecutive patients with middle cerebral artery occlusion admitted within 4...
September 14, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28904950/quantitative-changes-in-cerebral-perfusion-during-urinary-urgency-in-women-with-overactive-bladder
#12
Nisha G Arya, Steven J Weissbart, Sihua Xu, Rupal Bhavsar, Hengyi Rao
PURPOSE: To quantitatively measure changes in cerebral perfusion in select regions of interest in the brain during urinary urgency in women with overactive bladder (OAB) using arterial spin labeling (ASL). METHODS: Twelve women with OAB and 10 controls underwent bladder filling and rated urinary urgency (scale 0-10). ASL fMRI scans were performed (1) in the low urgency state after voiding and (2) high urgency state after drinking oral fluids. Absolute regional cerebral blood flow (rCBF) in select regions of interest was compared between the low and high urgency states...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28902182/gestational-age-dependent-relationship-between-cerebral-oxygen-extraction-and-blood-pressure
#13
Zachary A Vesoulis, Steve M Liao, Amit M Mathur
BackgroundPremature infants may lack mature cerebrovascular autoregulatory function and fail to adapt oxygen extraction to decreasing systemic perfusion.MethodsInfants ≤28 weeks of gestational age (GA) were recruited. Systemic oxygen saturation (SpO2), mean arterial blood pressure (MABP), and cerebral saturation (near-infrared spectroscopy, SctO2) were measured continuously over the first 72 h. Resulting data underwent error-processing. For each remaining 10 m window, the mean MABP and fractional tissue oxygen extraction (FTOE) were calculated...
September 13, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28901999/recruitment-of-prefrontal-striatal-circuit-in-response-to-skilled-motor-challenge
#14
Yumei Guo, Zhuo Wang, Sandhya Prathap, Daniel P Holschneider
A variety of physical fitness regimens have been shown to improve cognition, including executive function, yet our understanding of which parameters of motor training are important in optimizing outcomes remains limited. We used functional brain mapping to compare the ability of two motor challenges to acutely recruit the prefrontal-striatal circuit. The two motor tasks - walking in a complex running wheel with irregularly spaced rungs or walking in a running wheel with a smooth internal surface - differed only in the extent of skill required for their execution...
September 8, 2017: Neuroreport
https://www.readbyqxmd.com/read/28900832/spatial-discrimination-of-glioblastoma-and-treatment-effect-with-histologically-validated-perfusion-and-diffusion-magnetic-resonance-imaging-metrics
#15
Melissa A Prah, Mona M Al-Gizawiy, Wade M Mueller, Elizabeth J Cochran, Raymond G Hoffmann, Jennifer M Connelly, Kathleen M Schmainda
The goal of this study is to spatially discriminate tumor from treatment effect (TE), within the contrast-enhancing lesion, for brain tumor patients at all stages of treatment. To this end, the diagnostic accuracy of MRI-derived diffusion and perfusion parameters to distinguish pure TE from pure glioblastoma (GBM) was determined utilizing spatially-correlated biopsy samples. From July 2010 through June 2015, brain tumor patients who underwent pre-operative DWI and DSC-MRI and stereotactic image-guided biopsy were considered for inclusion in this IRB-approved study...
September 12, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28900672/extracorporeal-membrane-oxygenation-in-adult-patients-with-acute-fulminant-myocarditis-clinical-outcomes-and-risk-factor-analysis
#16
X Liao, B Li, Z Cheng
BACKGROUND: Our study aimed to summarize the clinical outcomes of extracorporeal membrane oxygenation (ECMO) in adult patients with acute fulminant myocarditis and to investigate the risk factors associated with its application. PATIENTS AND METHODS: We retrospectively examined patients with cardiogenic shock and acute fulminant myocarditis. The following data were collected: patients' preoperative general condition, related clinical factors during ECMO, complications, and outcomes of ECMO...
September 12, 2017: Herz
https://www.readbyqxmd.com/read/28899911/correlation-of-end-tidal-carbon-dioxide-amplitude-spectrum-area-and-coronary-perfusion-pressure-in-a-porcine-model-of-cardiac-arrest
#17
Nicolas Segal, Anja K Metzger, Johanna C Moore, Laura India, Michael C Lick, Paul S Berger, Wanchun Tang, David G Benditt, Keith G Lurie
Amplitude Spectrum Area (AMSA) values during ventricular fibrillation (VF) correlate with myocardial energy stores and predict defibrillation success. By contrast, end tidal CO2 (ETCO2) values provide a noninvasive assessment of coronary perfusion pressure and myocardial perfusion during cardiopulmonary resuscitation (CPR). Given the importance of the timing of defibrillation shock delivery on clinical outcome, we tested the hypothesis that AMSA and ETCO2 correlate with each other and can be used interchangably to correlate with myocardial perfusion in an animal laboratory preclinical, randomized, prospective investigation...
September 2017: Physiological Reports
https://www.readbyqxmd.com/read/28899897/transfusion-of-polynitroxylated-pegylated-hemoglobin-stabilizes-pial-arterial-dilation-and-decreases-infarct-volume-after-transient-middle-cerebral-artery-occlusion
#18
Suyi Cao, Jian Zhang, Li Ma, Carleton J C Hsia, Raymond C Koehler
BACKGROUND: Polynitroxylation of hemoglobin confers superoxide dismutase-mimetic and peroxidase activity and may protect from reperfusion injury in addition to facilitating oxygen transport. We determined whether transfusion of polynitroxylated PEGylated hemoglobin (PNPH) is protective in the rat filament model of 2 hours of middle cerebral artery occlusion (MCAO). METHODS AND RESULTS: Transfusion of 10 mL/kg of PNPH at 20 minutes of MCAO reduced infarct volume by over 70% (n=10)...
September 12, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28899866/subacute-endovascular-recanalization-of-symptomatic-cerebral-artery-occlusion-a-propensity-score-matched-analysis
#19
Sang Hun Lee, Dae Chul Suh, Su Hee Cho, Jae Jon Sheen, Deok Hee Lee, Jong S Kim
BACKGROUND: The interval between the onset of cerebral vessel occlusion and recanalization has been shown to be an independent predictor of poor outcomes. However, endovascular recanalization of symptomatic cerebral vessel occlusion in the subacute period has not been well documented. We investigated the safety and efficacy of subacute recanalization of occluded cerebral vessels in patients with ischemic stroke or transient ischemic attacks (TIAs). METHODS: Between 2014 and 2015, 98 patients were admitted to the emergency room for ischemic stroke or TIA with a small infarct core, which was defined as modest early ischemic change on non-contrast CT or overt diffusion-perfusion mismatch...
September 12, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28899758/chronic-global-analysis-of-vascular-permeability-and-cerebral-blood-flow-after-bone-marrow-stromal-cell-treatment-of-traumatic-brain-injury-in-the-rat-a-long-term-mri-study
#20
Lian Li, Michael Chopp, Guangliang Ding, Qingjiang Li, Asim Mahmood, Quan Jiang
Vascular permeability and hemodynamic alteration in response to the transplantation of human bone marrow stromal cells (hMSCs) after traumatic brain injury (TBI) were longitudinally investigated in non directly injured and normal-appearing cerebral tissue using magnetic resonance imaging (MRI). Male Wistar rats (300-350g, n=30) subjected to controlled cortical impact TBI were intravenously injected with 1 ml of saline (at 6-hours or 1-week post-injury, n=5/group) or with hMSCs in suspension (∼3x10(6) hMSCs, at 6-hours or 1-week post-injury, n=10/group)...
September 9, 2017: Brain Research
keyword
keyword
63330
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"