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autonomic failure

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https://www.readbyqxmd.com/read/28811392/role-of-sympathetic-cotransmitter-galanin-on-autonomic-balance-in-heart-failure-an-active-player-or-a-bystander
#1
Demet Özkaramanlı Gür, Miray Sağbaş, Aydın Akyüz, Savaş Güzel, Şeref Alpsoy, Niyazi Güler
OBJECTIVE: Galanin, a cotransmitter similar to neuropeptide Y (NPY), aggravates autonomic imbalance in systolic heart failure (HF) by attenuating vagal tonus after burst sympathetic activity. In animal HF models, galanin antagonists have improved cardiac function. To determine whether galanin is a promising therapeutic target in HF, we studied its concentrations in HF patients and evaluated its correlation with NPY, markers of humoral activity such as pro-BNP and copeptin, and echocardiographic parameters of HF severity...
August 11, 2017: Anatolian Journal of Cardiology
https://www.readbyqxmd.com/read/28807522/orthostatic-hypotension-a-practical-approach-to-investigation-and-management
#2
Amy C Arnold, Satish R Raj
The maintenance of blood pressure upon the assumption of upright posture depends on rapid cardiovascular adaptations driven primarily by the autonomic nervous system. Failure of these compensatory mechanisms can result in orthostatic hypotension (OH), defined as sustained reduction in systolic blood pressure > 20 mm Hg or diastolic blood pressure > 10 mm Hg within 3 minutes of standing or > 60° head-up tilt. OH is a common finding, particularly in elderly populations, associated with cardiovascular and cerebrovascular morbidity and mortality...
May 17, 2017: Canadian Journal of Cardiology
https://www.readbyqxmd.com/read/28805243/factors-associated-with-acceptance-of-pandemic-flu-vaccine-by-healthcare-professionals-in-spain-2009-2010
#3
Tania Fernández-Villa, Antonio J Molina, Nuria Torner, Jesus Castilla, Jenaro Astray, Susana García-Gutiérrez, José María Mayoral, Sonia Tamames, Ángela Domínguez, Vicente Martín
The A(H1N1)pdm09 influenza virus reached pandemic level in Spain in 2009, prompting a national vaccination campaign. To avoid transmission to patients, healthcare professionals' vaccination against pandemic influenza is crucial. The main objective of this study was to analyze factors associated with the failure by healthcare professionals to accept the pandemic vaccination in 2009. A cross-sectional survey was conducted of healthcare professionals in seven of Spain's autonomous regions. A questionnaire was used to collect information about personal and professional details, the respondents' flu vaccination status in the 2008-2009 and 2009-2010 seasons (seasonal and pandemic vaccines), and their knowledge and attitudes...
August 14, 2017: Research in Nursing & Health
https://www.readbyqxmd.com/read/28803960/evaluating-impacts-of-different-longitudinal-driver-assistance-systems-on-reducing-multi-vehicle-rear-end-crashes-during-small-scale-inclement-weather
#4
Ye Li, Lu Xing, Wei Wang, Hao Wang, Changyin Dong, Shanwen Liu
Multi-vehicle rear-end (MVRE) crashes during small-scale inclement (SSI) weather cause high fatality rates on freeways, which cannot be solved by traditional speed limit strategies. This study aimed to reduce MVRE crash risks during SSI weather using different longitudinal driver assistance systems (LDAS). The impact factors on MVRE crashes during SSI weather were firstly analyzed. Then, four LDAS, including Forward collision warning (FCW), Autonomous emergency braking (AEB), Adaptive cruise control (ACC) and Cooperative ACC (CACC), were modeled based on a unified platform, the Intelligent Driver Model (IDM)...
August 9, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28800884/ionic-mechanisms-of-the-action-of-anaesthetics-on-sinoatrial-node-automaticity
#5
REVIEW
Akiko Kojima, Hiroshi Matsuura
Although various general anaesthetics affect the heart rate in clinical settings, their precise mechanisms remain to be fully elucidated. Because the heart rate is determined by automaticity of the cardiac pacemaker sinoatrial node and its regulation by autonomic nervous system, it is important to clarify the effect of anaesthetics on sinoatrial node automaticity. The spontaneous electrical activity of sinoatrial node is generated by a complex but coordinated interaction of multiple ionic currents, such as the hyperpolarisation-activated cation current (If), T-type and L-type Ca(2+) currents (ICa,T and ICa,L), Na(+)/Ca(2+) exchange current (INCX), and rapidly and slowly activating delayed rectifier K(+) currents (IKr and IKs)...
August 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28798990/myocardial-123-i-metaiodobenzylguanidine-imaging-in-hypertension-and-left-ventricular-hypertrophy
#6
Riccardo Liga, Alessia Gimelli, Paolo Marzullo, Giuseppe Ambrosio, Matteo Cameli, Elisabetta Cerbai, Stefano Coiro, Michele Emdin, Rossella Marcucci, Doralisa Morrone, Alberto Palazzuoli, Anna Sonia Petronio, Ketty Savino, Luigi Padeletti, Roberto Pedrinelli
Sympathetic nervous system plays a pivotal role in essential hypertension and in the development of left ventricular hypertrophy. Moreover, cardiac sympathetic dys-regulation has been demonstrated as a key con-causal factor in the genesis and progression of pathologic conditions such as congestive heart failure and ischemic heart disease to which hypertension predisposes as a risk factor. However, despite its fundamental role in cardiac pathophysiology, the evaluation of cardiac sympathetic nervous system has never gained a wide clinical application, remaining mostly a research tool...
August 10, 2017: Journal of Nuclear Cardiology: Official Publication of the American Society of Nuclear Cardiology
https://www.readbyqxmd.com/read/28798922/practical-approach-to-the-patient-with-acute-neuromuscular-weakness
#7
REVIEW
Rajeev Nayak
Acute neuromuscular paralysis (ANMP) is a clinical syndrome characterized by rapid onset muscle weakness progressing to maximum severity within several days to weeks (less than 4 wk). Bulbar and respiratory muscle weakness may or may not be present. It is a common neurological emergency which requires immediate and careful investigations to determine the etiology because accurate diagnosis has significant impact on therapy and prognosis. Respiratory failure caused by neuromuscular weakness is considered as more critical than lung disease because its development may be insidious or subtle until sudden decompensation leads to life threatening hypoxia...
July 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/28795258/lipopolysaccharide-aggravated-doi-induced-tourette-syndrome-elaboration-for-recurrence-of-tourette-syndrome
#8
Long Hongyan, Si Zhenyang, Wang Chunyan, Pan Qingqing
Tourette syndrome (TS) is a neurological disorder characterized by highest familial recurrence rate among neuropsychiatric diseases with complicated inheritance. Recurrence of Tourette syndrome was frequently observed in clinical. Unexpectedly, the mechanism of recurrence of Tourette syndrome was failure to elucidate. Here, we first shown that lipopolysaccharide(LPS) may played an important role in the recurrence of Tourette syndrome. The TS model in rats was induced by DOI (the selective 5-HT2A/2C agonist 1-(2, 5-dimethoxy-4-iodophenyl) -2- aminopropane)...
August 9, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28791130/evolutionary-online-behaviour-learning-and-adaptation-in-real-robots
#9
Fernando Silva, Luís Correia, Anders Lyhne Christensen
Online evolution of behavioural control on real robots is an open-ended approach to autonomous learning and adaptation: robots have the potential to automatically learn new tasks and to adapt to changes in environmental conditions, or to failures in sensors and/or actuators. However, studies have so far almost exclusively been carried out in simulation because evolution in real hardware has required several days or weeks to produce capable robots. In this article, we successfully evolve neural network-based controllers in real robotic hardware to solve two single-robot tasks and one collective robotics task...
July 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28790913/the-dual-role-of-microglia-in-als-mechanisms-and-therapeutic-approaches
#10
REVIEW
Maria Concetta Geloso, Valentina Corvino, Elisa Marchese, Alessia Serrano, Fabrizio Michetti, Nadia D'Ambrosi
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by a non-cell autonomous motor neuron loss. While it is generally believed that the disease onset takes place inside motor neurons, different cell types mediating neuroinflammatory processes are considered deeply involved in the progression of the disease. On these grounds, many treatments have been tested on ALS animals with the aim of inhibiting or reducing the pro-inflammatory action of microglia and astrocytes and counteract the progression of the disease...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28769041/self-healing-of-damage-inside-metals-triggered-by-electropulsing-stimuli
#11
Hui Song, Zhong-Jin Wang, Xiao-Dong He, Jie Duan
The microscopic defects that distributed randomly in metals are not only hard to detect, but also may inevitably cause catastrophic failure. Thus, autonomic probing and healing for damage inside metals continue to be a challenging. Here we show a novel approach for self-healing using electropulsing as a stimulus to trigger repairing of damaged metals. This is achieved via a process that through expelling absolutely currents, the microcrack causes them to be redistributed to form a concentrated and a diluted region around it, thereby inducing an extremely high temperature gradient and a large compressive stress, which drive material flow to close microcracks...
August 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28763133/physical-activity-and-exercise-self-regulation-in-cancer-survivors-a-qualitative-study
#12
Edward Tsai, Michael C Robertson, Elizabeth J Lyons, Maria C Swartz, Karen Basen-Engquist
OBJECTIVE: Despite the benefits of physical activity, many cancer survivors do not adhere to clinically recommended levels. This qualitative study investigated factors of self-regulation contributing to survivor physical activity patterns. METHODS: Participants attended focus groups with prompts on exercise habits and self-regulation based on Social Cognitive Theory, Self-Determination Theory, and Self-Regulation Theory. Content analysis with a priori codes was conducted to identify emergent themes...
August 1, 2017: Psycho-oncology
https://www.readbyqxmd.com/read/28737621/baroreflex-activation-therapy-a-new-approach-to-the-management-of-advanced-heart-failure-with-reduced-ejection-fraction
#13
Edoardo Gronda, Darrel Francis, Faiez Zannad, Christian Hamm, Josep Brugada, Emilio Vanoli
: Chronic heart failure is a common clinical condition characterized by persistent excessive sympathetic nervous system activation. The derangement of the sympathetic activity has relevant implications for disease progression and patient survival. Aiming to positively impact patient outcome, autonomic nervous system modulatory therapies have been developed and tested in animal and clinical studies. As a general gross assumption, direct vagal stimulation and baroreflex activation are considered equivalent. This assumption does not take into account the fact that direct cervical vagal nerve stimulation involves activation of both afferent and efferent fibers innervating not only the heart, but the entire visceral system, leading to undesired responses to and from this compartment...
September 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28719273/bungarus-multicinctus-multicinctus-snakebite-in-taiwan
#14
Yan-Chiao Mao, Po-Yu Liu, Liao-Chun Chiang, Shu-Chen Liao, Hung-Yuan Su, Szu-Yin Hsieh, Chen-Chang Yang
AbstractAlthough specific antivenom is available in Taiwan, respiratory failure and general pain frequently accompany Bungarus multicinctus envenomation and there have been few reports on the management of B. multicinctus envenomation. We retrospectively analyzed 44 cases of B. multicinctus bite admitted to Taichung Veterans General Hospital (VGH) or to Taipei VGH. Demographic data, treatment, and outcome of patients with and without respiratory failure were compared. In this study, 20.5% patients had bites without noticeable signs or symptoms of significant envenoming, 27...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28717053/pure-autonomic-failure
#15
REVIEW
Thomas P Brown
Pure autonomic failure is a degenerative disorder of the peripheral autonomic nervous system. Patients experience symptomatic hypotension that requires them to sit, squat or lie down to prevent syncope. It is associated with characteristic histopathological findings, resulting in neuronal cytoplasmic inclusions in the peripheral autonomic nerves. These lesions are responsible for defects in the synthesis and release of norepinephrine from sympathetic nerve terminals, resulting in significant hypotension. Patients with autonomic failure also have exaggerated blood pressure responses to common stimuli such as food or fluid intake, heat, exercise and medications...
July 17, 2017: Practical Neurology
https://www.readbyqxmd.com/read/28713844/epidemiology-diagnosis-and-management-of-neurogenic-orthostatic-hypotension
#16
Jose-Alberto Palma, Horacio Kaufmann
BACKGROUND: Orthostatic hypotension (OH) is a sustained fall in blood pressure on standing which can cause symptoms of organ hypoperfusion. OH is associated with increased morbidity and mortality and leads to a significant number of hospital admissions particularly in the elderly (233 per 100,000 patients over 75 years of age in the US). OH can be due to volume depletion, blood loss, large varicose veins, medications, or due to defective activation of sympathetic nerves and reduced norepinephrine release upon standing (i...
May 2017: Movement Disorders Clinical Practice
https://www.readbyqxmd.com/read/28713288/commentary-autonomic-modulation-in-patients-with-heart-failure-increases-beat-to-beat-variability-of-ventricular-action-potential-duration
#17
COMMENT
Valerie Y H Van Weperen, Marc A Vos, Marcel A G Van der Heyden
No abstract text is available yet for this article.
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28712539/chronic-treatment-with-angiotensin-converting-enzyme-inhibitor-increases-cardiac-fibrosis-in-young-rats-submitted-to-early-ovarian-failure
#18
Sabrina Graziani Veloso Dutra, Ana Carolina Sanches Felix, Ada Clarice Gastaldi, Tábata De Paula Facioli, Suenimeire Vieira, Hugo Celso Dutra De Souza
BACKGROUND: We investigated whether the treatment with enalapril maleate, combined with aerobic physical training, promotes positive effects on the autonomic balance, the morphology and the cardiac function in female rats submitted to early ovarian failure. METHODS: Thirty-five female Wistar rats, ovariectomized at 10weeks of age, were assigned into Ovariectomized rats (OVX) and Ovariectomized rats treated with enalapril maleate (OVX-EM, 10mg(-1)·kg(-1)·d(-1)) Each group was subdivided into sedentary and trained (aerobic swimming training for 10weeks)...
September 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28702747/management-of-supine-hypertension-complicating-neurogenic-orthostatic-hypotension
#19
Jacquie Baker, Kurt Kimpinski
Neurogenic orthostatic hypotension (NOH) can be present in a number of disorders, including synucleinopathies, autoimmune disorders, and various genetic disorders. All are characterized by defective norepinephrine release from sympathetic terminals upon standing, resulting in impaired vasoconstriction. NOH is defined as a drop in systolic blood pressure ≥20 mmHg or diastolic blood pressure ≥10 mmHg, or both, within 3 minutes of standing or head up-tilt at a minimum of 60°. However, approximately 50% of patients have associated supine hypertension, which greatly complicates treatment...
August 2017: CNS Drugs
https://www.readbyqxmd.com/read/28698998/does-organ-selling-violate-human-dignity
#20
Zümrüt Alpinar-Şencan, Holger Baumann, Nikola Biller-Andorno
Shortages in the number of donated organs after death and the growing number of end-stage organ failure patients on waiting lists call for looking at alternatives to increase the number of organs that could be used for transplantation purposes. One option that has led to a legal and ethical debate is to have regulated markets in human organs. Opponents of a market in human organs offer different arguments that are mostly founded on contingent factors that can be adjusted. However, some authors have asked the question whether we still have a reason to believe that there is something wrong with offering human organs for sale for transplantation purposes, even if the circumstances under which the practice takes place are improved...
July 11, 2017: Monash Bioethics Review
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