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Cerebrovascular Dysfunction

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https://www.readbyqxmd.com/read/28529871/subtle-alterations-in-cerebrovascular-reactivity-in-mild-cognitive-impairment-detected-by-graph-theoretical-analysis-and-not-by-the-standard-approach
#1
Carlos A Sánchez-Catasús, Gretel Sanabria-Diaz, Antoon Willemsen, Eduardo Martinez-Montes, Juan Samper-Noa, Angel Aguila-Ruiz, Ronald Boellaard, Peter De Deyn, Rudi A J O Dierckx, Lester Melie-Garcia
There is growing support that cerebrovascular reactivity (CVR) in response to a vasodilatory challenge, also defined as the cerebrovascular reserve, is reduced in Alzheimer's disease dementia. However, this is less clear in patients with mild cognitive impairment (MCI). The current standard analysis may not reflect subtle abnormalities in CVR. In this study, we aimed to investigate vasodilatory-induced changes in the topology of the cerebral blood flow correlation (CBFcorr) network to study possible network-related CVR abnormalities in MCI...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28527209/neuroimaging-and-its-relevance-to-understanding-pathways-linking-diabetes-and-cognitive-dysfunction
#2
Chris Moran, Richard Beare, Thanh Phan, Sergio Starkstein, David Bruce, Mizrahi Romina, Velandai Srikanth
Diabetes mellitus is associated with an elevated risk of cognitive impairment and dementia. Cerebrovascular disease and neurodegeneration are two major pathways that may explain the effect of diabetes on the brain and therefore deserve investigation. Neuroimaging provides an effective way to investigate the contribution of these pathways in vivo, guiding further mechanistic research and providing biomarkers for clinical correlation or interventional studies. In this paper, we present a narrative review of the state of play with neuroimaging evidence in studies of people with diabetes mellitus, how these data are useful in understanding mechanistic links between diabetes and brain impairment, and possible ways that the field may develop in the future...
May 17, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28527058/headache-and-arterial-hypertension
#3
Cinzia Finocchi, Davide Sassos
Elevated blood pressure (BP) and headache have long been linked in the medical literature. Headache associated with arterial hypertension is a main concern in emergency department. It is believed that headache may be a symptom attributed to arterial hypertension only if the BP values are very high or rise quickly. Many studies support the hypothesis that migraine patients have an increased risk of developing hypertension, while hypertensive subjects do not seem to have an increased risk of migraine or other types of headache...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28523471/quantification-of-left-atrial-volume-and-phasic-function-using-cardiovascular-magnetic-resonance-imaging-comparison-of-biplane-area-length-method-and-simpson-s-method
#4
Laura Kristin Wandelt, Johannes Tammo Kowallick, Andreas Schuster, Rolf Wachter, Thomas Stümpfig, Christina Unterberg-Buchwald, Michael Steinmetz, Christian Oliver Ritter, Joachim Lotz, Wieland Staab
Left atrial (LA) enlargement and dysfunction are markers of chronic diastolic dysfunction and an important predictor of adverse cardiovascular and cerebrovascular outcomes. Accordingly, accurate quantification of left atrial volume (LAV) and function is needed. In routine clinical cardiovascular magnetic resonance (CMR) imaging the biplane area-length method (Bi-ALM) is frequently applied due to time-saving image acquisition and analysis. However, given the varying anatomy of the LA we hypothesized that the diagnostic accuracy of the Bi-ALM is not sufficient and that results would be different from a precise volumetric assessment of transversal multi-slice cine images using Simpson's method...
May 18, 2017: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/28515112/impact-of-the-metabolic-syndrome-on-mortality-is-modified-by-objective-short-sleep-duration
#5
Julio Fernandez-Mendoza, Fan He, Caitlin LaGrotte, Alexandros N Vgontzas, Duanping Liao, Edward O Bixler
BACKGROUND: To examine whether objective sleep duration is an effect modifier of the impact of metabolic syndrome (MetS) on all-cause and cardiovascular disease/cerebrovascular mortality. METHODS AND RESULTS: We addressed this question in the Penn State Adult Cohort, a random, general population sample of 1344 men and women (48.8±14.2 years) who were studied in the sleep laboratory and followed up for 16.6±4.2 years. MetS was defined by the presence of 3 or more of obesity (≥30 kg/m(2)), elevated total cholesterol (≥200 mg/dL), triglycerides (≥150 mg/dL), fasting glucose (≥100 mg/dL), and blood pressure (≥130/85 mm Hg)...
May 17, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28515043/brain-perivascular-macrophages-initiate-the-neurovascular-dysfunction-of-alzheimer-a%C3%AE-peptides
#6
Laibaik Park, Ken Uekawa, Lidia Garcia-Bonilla, Kenzo Koizumi, Michelle Murphy, Rose Pitstick, Linda H Younkin, Steven G Younkin, Ping Zhou, Geroge A Carlson, Josef Anrather, Costantino Iadecola
Rationale: Increasing evidence indicates that alterations of the cerebral microcirculation may play a role in Alzheimer's disease (AD), the leading cause of late-life dementia. The amyloid-β peptide (Aβ), a key pathogenic factor in AD, induces profound alterations in neurovascular regulation through the innate immunity receptor CD36, which, in turn, activates a Nox2-containing NADPH oxidase leading to cerebrovascular oxidative stress. Brain perivascular macrophages (PVM) located in the perivascular space, a major site of brain Aβ collection and clearance, are juxtaposed to the wall of intracerebral resistance vessels and are a powerful source of reactive oxygen species (ROS)...
May 17, 2017: Circulation Research
https://www.readbyqxmd.com/read/28505046/south-asians-why-are-they-at-a-higher-risk-for-cardiovascular-disease
#7
Anjly Jain, Rajeev Puri, Devaki R Nair
PURPOSE OF REVIEW: We comment on the high prevalence of cardiovascular disease (CVD) in South Asians (SA). The effect of various risk factors, for example biochemical, genetic, lifestyle, socioeconomic factors and psychosocial stress on CVD risk is discussed. RECENT FINDINGS: 'Prediabetes' is common in SA, but its relationship with coronary artery disease (CAD) is not significant unlike for the white population. At the same time, 'prediabetes' in SA is associated with an increased risk for cerebrovascular disease (CeVD)...
May 12, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28503567/cognitive-impairment-in-chronic-kidney-disease-vascular-milieu-and-the-potential-therapeutic-role-of-exercise
#8
REVIEW
Ulf G Bronas, Houry Puzantian, Mary Hannan
Chronic kidney disease (CKD) is considered a model of accelerated aging. More specifically, CKD leads to reduced physical functioning and increased frailty, increased vascular dysfunction, vascular calcification and arterial stiffness, high levels of systemic inflammation, and oxidative stress, as well as increased cognitive impairment. Increasing evidence suggests that the cognitive impairment associated with CKD may be related to cerebral small vessel disease and overall impairment in white matter integrity...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28498345/effects-of-long-chain-omega-3-polyunsaturated-fatty-acids-on-endothelial-vasodilator-function-and-cognition-are-they-interrelated
#9
REVIEW
Julia C Kuszewski, Rachel H X Wong, Peter R C Howe
Long-chain omega-3 polyunsaturated fatty acids (LCn-3 PUFA) may improve brain functions by acting on endothelial cells in the cerebrovasculature to facilitate vasodilatation and perfusion. The aim of this review is to explore this hypothesis by analyzing the effect of LCn-3 PUFA supplementation on systemic vasodilator and cognitive function and finding evidence to link LCn-3 PUFA intake, vasodilator function and cognition. Forty randomized controlled trials examining the effect of LCn-3 PUFA supplementation in humans on either endothelial vasodilator function or cognition were identified and pooled effects measured with a weighted analysis...
May 12, 2017: Nutrients
https://www.readbyqxmd.com/read/28495319/clinical-characteristics-and-mortality-in-patients-treated-in-a-multidisciplinary-diabetic-foot-unit
#10
José Antonio Rubio, Sara Jiménez, Julia Álvarez
BACKGROUND AND OBJECTIVE: This study reviews the clinical characteristics of patients with diabetic foot ulcer treated in a Multidisciplinary Diabetic Foot Unit (MDFU) and analyzes the mortality and factors associated with its survival. MATERIAL AND METHODS: Data from all patients who attended the MDFU for the first time for a diabetic foot ulcer during the 2008-2014 period were analized. The patients were followed until their death or until June 30, 2016, for up to 8 years...
May 2017: Endocrinol Diabetes Nutr
https://www.readbyqxmd.com/read/28494974/multiple-comorbidities-and-response-to-cardiac-resynchronization-therapy-madit-crt-long-term-follow-up
#11
Emily P Zeitler, Daniel J Friedman, James P Daubert, Sana M Al-Khatib, Scott D Solomon, Yitschak Biton, Scott McNitt, Wojciech Zareba, Arthur J Moss, Valentina Kutyifa
BACKGROUND: Data regarding cardiac resynchronization therapy (CRT) in patients with multiple comorbidities are limited. OBJECTIVES: This study evaluated the association of multiple comorbidities with the benefits of CRT over implantable cardioverter-defibrillator (ICD) alone. METHODS: We examined 1,214 MADIT-CRT (Multicenter Automatic Defibrillator Implantation Trial with Cardiac Resynchronization Therapy) study patients with left bundle branch block (LBBB) and 0, 1, 2, or ≥3 comorbidities, including renal dysfunction, hypertension (HTN), diabetes, coronary artery disease, history of atrial arrhythmias, history of ventricular arrhythmias, current smoking, and cerebrovascular accident...
May 16, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28490336/characteristics-of-l-citrulline-transport-through-blood-brain-barrier-in-the-brain-capillary-endothelial-cell-line-tr-bbb-cells
#12
Kyeong-Eun Lee, Young-Sook Kang
BACKGROUND: L-Citrulline is a neutral amino acid and a major precursor of L-arginine in the nitric oxide (NO) cycle. Recently it has been reported that L-citrulline prevents neuronal cell death and protects cerebrovascular injury, therefore, L-citrulline may have a neuroprotective effect to improve cerebrovascular dysfunction. Therefore, we aimed to clarify the brain transport mechanism of L-citrulline through blood-brain barrier (BBB) using the conditionally immortalized rat brain capillary endothelial cell line (TR-BBB cells), as an in vitro model of the BBB...
May 10, 2017: Journal of Biomedical Science
https://www.readbyqxmd.com/read/28489799/comparison-of-clinical-outcomes-in-peripartum-cardiomyopathy-and-age-matched-dilated-cardiomyopathy-a-15-year-nationwide-population-based-study-in-asia
#13
Cheng-Hui Lu, Wen-Chen Lee, Michael Wu, Shao-Wei Chen, Jih-Kai Yeh, Chun-Wen Cheng, Katie Pei-Hsuan Wu, Ming-Shien Wen, Tien-Hsing Chen, Victor Chien-Chia Wu
Peripartum cardiomyopathy (PPCM), often classified as a form of dilated cardiomyopathy (DCM), is the myocardial dysfunction that occurs in late pregnancy and through the first few postpartum months.The aim of this study is to investigate the differences in the clinical outcomes of PPCM and DCM.Electronic medical records from 1997 to 2011 were retrieved from the Taiwan National Health Insurance Research Database. Patients with PPCM were compared with age- and clinical characteristics-matched patients with DCM...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28481466/investigation-of-mthfr-gene-c677t-polymorphism-in-cardiac%C3%A2-syndrome-x-patients
#14
Cemre Kandaz, Burak Önal, Deniz Özen, Bülent Demir, A Gökhan Akkan, Sibel Özyazgan
BACKGROUND: Definition of Cardiac Syndrome X (CSX) refers to groups of patients with positive exercise stress test and normal epicardial coronary arteries on coronary angiography accompanied by chest pain. Although the etiology of CSX is not completely understood, there is a common consensus that its pathophysiology may be associated with endothelial dysfunction resulting in impaired coronary flow. Some polymorphisms observed on the MTHFR gene cause inactivation of the MTHFR enzyme, leading to hyperhomocysteinemia and homocysteinuria, which are prominent risk factors of cardiovascular and cerebrovascular diseases...
May 8, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28475697/off-pump-coronary-artery-bypass-surgery-outcomes-in-patients-with-ischaemic-left-ventricular-systolic-dysfunction-with-or-without-detected-viable-myocardium
#15
Sen Li, Haiqing Li, Zhize Yuan, Baoli Zhang, Anqing Chen, Mi Zhou, Jun Liu, Junfeng Cai, Zhe Wang, Xiaofeng Ye, Qiang Zhao
OBJECTIVES: : The prognostic value of myocardial viability before coronary bypass grafting remains controversial. The present study evaluated the effects of off-pump coronary artery bypass (OPCAB) grafting on patients with coronary artery disease (CAD) with or without viable myocardium (VM) preoperatively detected via nuclear imaging. METHODS: : A total of 115 consecutive patients with 3-vessel disease and impaired left ventricular ejection fraction (LVEF ≤ 45%) who underwent OPCAB grafting were recruited in this prospective study...
May 5, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28467985/effects-of-antenatal-melatonin-treatment-on-the-cerebral-vasculature-in-an-ovine-model-of-fetal-growth-restriction
#16
Margie Castillo-Melendez, Tamara Yawno, Amy Sutherland, Graham Jenkin, Euan M Wallace, Suzanne L Miller
Chronic moderate hypoxia, such as occurs in fetal growth restriction (FGR) during gestation, compromises the blood-brain barrier (BBB) and results in structural abnormalities of the cerebral vasculature. We have previously determined the neuroprotective and antioxidant effects of maternal administration of melatonin (MLT) on growth-restricted newborn lambs. The potential of maternal MLT therapy for the treatment of cerebrovascular dysfunction-associated developmental hypoxia has also been demonstrated in newborn lambs...
May 4, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28453793/impact-of-gender-on-long-term-outcomes-after-surgical-repair-for-acute-stanford-a-aortic-dissection-a-propensity-score-matched-analysis%C3%A2
#17
Anton Sabashnikov, Stephanie Heinen, Antje Christin Deppe, Mohamed Zeriouh, Alexander Weymann, Ingo Slottosch, Kaveh Eghbalzadeh, Aron-Frederik Popov, Oliver Liakopoulos, Parwis B Rahmanian, Navid Madershahian, Axel Kroener, Yeong-Hoon Choi, Ferdinand Kuhn-Régnier, André R Simon, Thorsten Wahlers, Jens Wippermann
OBJECTIVES: Previous research suggests that female gender is associated with increased mortality rates after surgery for Stanford A acute aortic dissection (AAD). However, women with AAD usually present with different clinical symptoms that may bias outcomes. Moreover, there is a lack of long-term results regarding overall mortality and freedom from major cerebrovascular events. We analysed the impact of gender on long-term outcomes after surgery for Stanford A AAD by comparing genders with similar risk profiles using propensity score matching...
May 1, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28453191/naringenin-prevents-ischemic-stroke-damage-via-anti-apoptotic-and-anti-oxidant-effects
#18
Kaihua Wang, Zhenzhen Chen, Jianmin Huang, Longjian Huang, Ning Luo, Xiulin Liang, Mingkun Liang, Wei Xie
Apoptosis and oxidative stress are considered to be the major factors associated with the development and progression of many ischemic cerebrovascular diseases. Naringenin (NAR) is an abundant flavanone in citrus plants and has been found to exhibit anti-oxidant, anti-carcinogenic and anti-apoptotic effects. This study aimed to investigate the anti-apoptotic and anti-oxidant effects of naringenin on ischemic stroke. In vitro, cortical neuron cells isolated from the brains of neonatal Sprague-Dawley rats were randomly divided into control, oxygen and glucose deprivation/reperfusion (OGD/Rep), NAR-L, NAR-M and NAR-H groups...
April 28, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28450040/comparison-of-predictors-of-heart-failure-with-preserved-versus-reduced-ejection-fraction-in-a-multiracial-cohort-of-preclinical-left-ventricular-diastolic-dysfunction
#19
Lili Zhang, Jared J Liebelt, Nidhi Madan, Jian Shan, Cynthia C Taub
Preclinical diastolic dysfunction (PDD) is a well-known but poorly understood risk factor for heart failure. We aimed to investigate risk factors contributing to progression of PDD to heart failure with preserved ejection fraction (HFpEF) and heart failure with reduced ejection fraction (HFrEF). Patients with echocardiogram from 2003 to 2008 with left ventricular ejection fraction ≥50%, grade I diastolic dysfunction, and free of clinical heart failure were included. The end point was incident HFpEF or HFrEF...
June 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/28444637/phase-dependent-astroglial-alterations-in-li-pilocarpine-induced-status-epilepticus-in-young-rats
#20
Adriana Fernanda K Vizuete, Matheus Mittmann Hennemann, Carlos Alberto Gonçalves, Diogo Losch de Oliveira
Epilepsy prevalence is high in infancy and in the elderly population. Lithium-pilocarpine is widely used to induce experimental animal models of epilepsy, leading to similar neurochemical and morphological alterations to those observed in temporal lobe epilepsy. As astrocytes have been implicated in epileptic disorders, we hypothesized that specific astroglial changes accompany and contribute to epileptogenesis. Herein, we evaluated time-dependent astroglial alterations in the hippocampus of young (27-day-old) rats at 1, 14 and 56 days after Li-pilocarpine-induced status epilepticus (SE), corresponding to different phases in this model of epilepsy...
April 25, 2017: Neurochemical Research
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