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autonomic function test

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https://www.readbyqxmd.com/read/28325598/sudomotor-dysfunction-as-a-measure-of-small-fiber-neuropathy-in-type-1-diabetes
#1
Lynn Ang, Mamta Jaiswal, Brian Callaghan, David Raffel, Morton B Brown, Rodica Pop-Busui
BACKGROUND: This study evaluated whether measuring the electrochemical skin conductance (ESC), as an indirect measure of sudomotor function, may be also a reliable surrogate for early cardiovascular autonomic neuropathy (CAN). METHODS: Longitudinal study included 37 type 1 diabetes (T1D) subjects (mean age 38±13years, duration 15±7years, HbA1c 7.9±1.1%, no known complications at baseline), and 40 age-matched healthy control (HC) subjects. Mean hands ESC (ESChands) and feet (ESCfeet) were measured with the SUDOSCAN (Impeto Medical, France)...
March 10, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/28323447/injury-mitigation-estimates-for-an-intersection-driver-assistance-system-in-straight-crossing-path-crashes-in-the-u-s
#2
John M Scanlon, Rini Sherony, Hampton C Gabler
OBJECTIVE: Accounting for one-fifth of all crashes and one-sixth of all fatal crashes in the U.S., intersection crashes are among the most frequent and fatal crash modes. Intersection Advanced Driver Assistance Systems (I-ADAS) are emerging vehicle-based active safety systems that aim to help drivers safely navigate intersections. The objective of this study was to estimate the number of crashes and number of vehicles with a seriously injured driver (MAIS3+) that could be prevented or reduced if, for every straight crossing path (SCP) intersection crash, one of the vehicles had been equipped with an I-ADAS...
March 21, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28321329/utility-of-the-wireless-motility-capsule-and-lactulose-breath-testing-in-the-evaluation-of-patients-with-parkinson-s-disease-who-present-with-functional-gastrointestinal-symptoms
#3
Andrew Su, Rita Gandhy, Carrolee Barlow, George Triadafilopoulos
BACKGROUND: The aetiology and origin of gastrointestinal symptoms in Parkinson's disease (PD) remains poorly understood. Gastroparesis, small bowel transit delay and bacterial overgrowth may, individually or collectively, play a role. AIMS: In patients with PD and functional gastrointestinal symptoms, we aimed to determine the utility of the wireless motility capsule and lactulose breath tests in further defining their symptoms' aetiology. METHODS: In this retrospective cohort study, consecutive patients with PD and functional gastrointestinal symptoms underwent clinical assessment, as well as wireless motility capsule and lactulose breath testing using standard protocols...
2017: BMJ Open Gastroenterology
https://www.readbyqxmd.com/read/28315024/autonomic-function-tests-introduction-to-the-series
#4
EDITORIAL
David S Goldstein, William P Cheshire
No abstract text is available yet for this article.
March 17, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28303275/modeling-pathological-hemodynamic-responses-to-the-valsalva-maneuver
#5
Leszek Pstras, Karl Thomaseth, Jacek Waniewski, Italo Balzani, Federico Bellavere
The Valsalva maneuver consisting in a forced expiration against closed airways is one of the most popular clinical tests of the autonomic nervous system function. When properly performed by a healthy subject, it features four characteristic phases of arterial blood pressure and heart rate variations, based on the magnitude of which the autonomic function may be assessed qualitatively and quantitatively. In patients with some disorders or in healthy patients subject to specific conditions, the pattern of blood pressure and heart rate changes during the execution of the Valsalva maneuver may, however, differ from the typical sinusoidal-like pattern...
March 17, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28299706/microfluidic-pouch-chips-for-immunoassays-and-nucleic-acid-amplification-tests
#6
Michael G Mauk, Changchun Liu, Xianbo Qiu, Dafeng Chen, Jinzhao Song, Haim H Bau
Microfluidic cassettes ("chips") for processing and analysis of clinical specimens and other sample types facilitate point-of-care (POC) immunoassays and nucleic acid based amplification tests. These single-use test chips can be self-contained and made amenable to autonomous operation-reducing or eliminating supporting instrumentation-by incorporating laminated, pliable "pouch" and membrane structures for fluid storage, pumping, mixing, and flow control. Materials and methods for integrating flexible pouch compartments and diaphragm valves into hard plastic (e...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28289649/hypothermia-presenting-in-wernicke-encephalopathy-a-case-report
#7
Seok Hyun Hong, Ju Sun Oh, Chang Hyun Lee, Jae Ho Oh
Wernicke encephalopathy (WE) is a neurologic disorder characterized by clinical symptoms, such as nystagmus, ataxia, and mental confusion. Hypothermia in patients with WE is a rare complication, and its pathogenic mechanism and therapy are yet to be ascertained. Herein, we presented a case of a 61-year-old man who was diagnosed with WE 3 months earlier. We investigated the cause of hypothermia (35.0℃) that occurred after an enema (bowel emptying). Brain magnetic resonance imaging revealed mammillary body and hypothalamus atrophy...
February 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28287428/an-experimental-study-of-the-effects-of-external-physiological-parameters-on-the-photoplethysmography-signals-in-the-context-of-local-blood-pressure-hydrostatic-pressure-changes
#8
Hongwei Yuan, Sven Poeggel, Thomas Newe, Elfed Lewis, Charusluk Viphavakit, Gabriel Leen
A comprehensive study of the effect of a wide range of controlled human subject motion on Photoplethysmographic signals is reported. The investigation includes testing of two separate groups of 5 and 18 subjects who were asked to undertake set exercises whilst simultaneously monitoring a wide range of physiological parameters including Breathing Rate, Heart Rate and Localised Blood Pressure using commercial clinical sensing systems. The unique finger mounted PPG probe equipped with miniature three axis accelerometers for undertaking this investigation was a purpose built in-house version which is designed to facilitate reproducible application to a wide range of human subjects and the study of motion...
March 10, 2017: Sensors
https://www.readbyqxmd.com/read/28287078/the-design-of-and-chronic-tissue-response-to-a-composite-nerve-electrode-with-patterned-stiffness
#9
Max Freeberg, Matthew Stone, Ronald Triolo, Dustin Tyler
As neural interfaces demonstrate success in chronic applications, a novel class of reshaping electrodes with patterned regions of stiffness will enable application to a widening range of anatomical locations. Patterning stiff regions and flexible regions of the electrode enables nerve reshaping while accommodating anatomical constraints of various implant locations ranging from peripheral nerves to spinal and autonomic plexi. Introduced is a new composite electrode enabling patterning of regions of various electrode mechanical properties...
March 13, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28286774/orthostatic-intolerance-and-postural-orthostatic-tachycardia-syndrome-in-joint-hypermobility-syndrome-ehlers-danlos-syndrome-hypermobility-type-neurovegetative-dysregulation-or-autonomic-failure
#10
Claudia Celletti, Filippo Camerota, Marco Castori, Federica Censi, Laura Gioffrè, Giovanni Calcagnini, Stefano Strano
Background. Joint hypermobility syndrome/Ehlers-Danlos syndrome, hypermobility type (JHS/EDS-HT), is a hereditary connective tissue disorder mainly characterized by generalized joint hypermobility, skin texture abnormalities, and visceral and vascular dysfunctions, also comprising symptoms of autonomic dysfunction. This study aims to further evaluate cardiovascular autonomic involvement in JHS/EDS-HT by a battery of functional tests. Methods. The response to cardiovascular reflex tests comprising deep breathing, Valsalva maneuver, 30/15 ratio, handgrip test, and head-up tilt test was studied in 35 JHS/EDS-HT adults...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28285240/sudarshan-kriya-yoga-improves-cardiac-autonomic-control-in-patients-with-anxiety-depression-disorders
#11
Edgar Toschi-Dias, Eleonora Tobaldini, Monica Solbiati, Giorgio Costantino, Roberto Sanlorenzo, Stefania Doria, Floriana Irtelli, Claudio Mencacci, Nicola Montano
BACKGROUND: Several studies have demonstrated that adjuvant therapies as exercise and breathing training are effective in improving cardiac autonomic control (CAC) in patients with affective spectrum disorders. However, the effects of Sudarshan Kriya Yoga (SKY) on autonomic function in this population is unknown. Our objective was to test the hypothesis that SKY training improves CAC and cardiorespiratory coupling in patients with anxiety and/or depression disorders. METHODS: Forty-six patients with a diagnosis of anxiety and/or depression disorders (DSM-IV) were consecutively enrolled and divided in two groups: 1) conventional therapy (Control) and 2) conventional therapy associated with SKY (Treatment) for 15 days...
March 7, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28275877/cardiovascular-autonomic-dysfunction-and-carotid-stiffness-in-adults-with-repaired-tetralogy-of-fallot
#12
Marko Novaković, Katja Prokšelj, Vito Starc, Borut Jug
PURPOSE: Adults after surgical repair of tetralogy of Fallot (ToF) may have impaired vascular and cardiac autonomic function. Thus, we wanted to assess interrelations between heart rate variability (HRV) and heart rate recovery (HRR), as parameters of cardiac autonomic function, and arterial stiffness, as a parameter of vascular function, in adults with repaired ToF as compared to healthy controls. METHODS: In a case-control study of adults with repaired ToF and healthy age-matched controls we measured: 5-min HRV variability (with time and frequency domain data collected), carotid artery stiffness (through pulse-wave analysis using echo-tracking ultrasound) and post-exercise HRR (cycle ergometer exercise testing)...
March 8, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28275061/impaired-sweating-responses-to-a-passive-whole-body-heat-stress-in-individuals-with-multiple-sclerosis
#13
Dustin R Allen, Mu Huang, Iqra M Parupia, Ariana R Dubelko, Elliot M Frohman, Scott L Davis
Multiple sclerosis (MS) is an autoimmune disease that affects the central nervous system (CNS), disrupting autonomic function. The aim of this study was to test the hypothesis that individuals with MS have blunted control of thermoregulatory reflex increases in sweat rate (SR) and cutaneous vasodilation compared to controls during a passive whole-body heat stress (WBH). Eighteen individuals with relapsing-remitting MS and 18 healthy controls (CON) participated in the study. Core temperature (Tcore), skin temperature, heart rate, arterial blood pressure (10 min intervals), skin blood flow (laser-Doppler flux: LDF), and SR were continuously measured during normothermic baseline (34 °C water perfusing a tube-lined suit) and WBH (increased Tcore 0...
March 8, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28270757/effectiveness-of-a-novel-qigong-meditative-movement-practice-for-impaired-health-in-flight-attendants-exposed-to-second-hand-cigarette-smoke
#14
Peter Payne, Steven Fiering, James C Leiter, David T Zava, Mardi A Crane-Godreau
This single-arm non-randomized pilot study explores an intervention to improve the health of flight attendants (FA) exposed to second-hand cigarette smoke prior to the smoking ban on commercial airlines. This group exhibits an unusual pattern of long-term pulmonary dysfunction. We report on Phase I of a two-phase clinical trial; the second Phase will be a randomized controlled trial testing digital delivery of the intervention. Subjects were recruited in the Northeastern US; testing and intervention were administered in 4 major cities...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28268874/short-term-assessment-of-autonomic-nervous-system-as-a-potential-tool-to-quantify-pain-experience
#15
Arto J Hautala, Jaro Karppinen, Tapio Seppanen
Various pain conditions may result in altered autonomic nervous system regulation. We evaluated whether autonomic regulation, analyzed with short-term heart rate variability (HRV), differs between low back pain (LBP) patients and healthy controls. Additionally, we tested if short-term HRV recordings are feasible and informative in planning home monitoring of LBP patients. The study population consisted of 16 volunteers (8 LBP patients and 8 healthy subjects) (age 42±10 years, body mass index 26±4 kg/m2, 7 men and 9 women)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268476/heart-rate-independent-qt-variability-component-can-detect-subclinical-cardiac-autonomic-neuropathy-in-diabetes
#16
Mohammad H Imam, Chandan K Karmakar, Ahsan H Khandoker, Herbert F Jelinek, M Palaniswami
Cardiac autonomic neuropathy (CAN) may lead to life threatening arrhythmia due to denervation of both the parasympathetic and sympathetic branches of autonomic nervous system innervating the heart. CAN is a frequently under diagnosed complication of diabetes, because a patient can have asymptomatic CAN for several years before it is clinically apparent. However, detection of CAN at the early or subclinical stage leads to more effective treatment outcomes. Cardiac autonomic reflex tests (CART) (i.e. Ewing test battery) are normally used for the detection and staging of CAN...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267568/facing-two-faces-defense-activation-varies-as-a-function-of-personal-relevance
#17
Florian Bublatzky, Georg W Alpers
It can be unsettling to be watched by a group of people, and when they express anger or hostility, this can prime defensive behavior. In contrast, when others smile at us, this may be comforting. This study tested to which degree the impact of facial expressions (happy, neutral, and angry) varies with the personal relevance of a social situation. Modelling a triadic situation, two faces looked either directly at the participant, faced each other, or they were back to back. Results confirmed that this variation constitutes a gradient of personal relevance (directed frontally > towards > away), as reflected by corresponding defensive startle modulation and autonomic nervous system activity...
March 4, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28263770/human-physiological-responses-to-wooden-indoor-environment
#18
Xi Zhang, Zhiwei Lian, Yong Wu
Previous studies are mainly focused on non-wooden environments, whereas few are concerned with wooden ones. How wooden indoor environments impact the physiology of the occupants is still unclear. The purpose of this study was to explore the distinct physiological responses to wooden and non-wooden indoor environments, assessed by physiological parameters tests including blood pressure, electrocardiogram measurements, electro-dermal activity, oxyhemoglobin saturation, skin temperature, and near distance vision...
March 2, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28258445/physio-somatic-symptoms-in-schizophrenia-association-with-depression-anxiety-neurocognitive-deficits-and-the-tryptophan-catabolite-pathway
#19
Buranee Kanchanatawan, Sunee Sirivichayakul, Supaksorn Thika, Kiat Ruxrungtham, André F Carvalho, Michel Geffard, George Anderson, Cristiano Noto, Rada Ivanova, Michael Maes
To investigate the frequency of physio-somatic symptoms (PS) symptoms in schizophrenia and their relation to positive, negative and affective symptoms; neurocognitive deficits and impairments in the tryptophan catabolite (TRYCAT) pathway. Eighty four patients with schizophrenia and 40 healthy controls were assessed using the 12 item Fibromyalgia and Chronic Fatigue Syndrome Rating scale (FF) and scales for negative and positive symptoms, depression and anxiety. Cognitive functioning was tested using the Cambridge Neuropsychological Test Automated Battery (CANTAB)...
March 3, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/28255249/association-between-obesity-and-heart-rate-variability-indices-an-intuition-toward-cardiac-autonomic-alteration-a-risk-of-cvd
#20
Ram Lochan Yadav, Prakash Kumar Yadav, Laxmi Kumari Yadav, Kopila Agrawal, Santosh Kumar Sah, Md Nazrul Islam
BACKGROUND: Obese people have a higher prevalence of cardiovascular disease, which is supposed to be due to autonomic dysfunction and/or metabolic disorder. The alterations in cardiac autonomic functions bring out the changes in the heart rate variability (HRV) indicators, an assessing tool for cardiac autonomic conditions. OBJECTIVE: To compare the cardiac autonomic activity between obese and normal weight adults and find out the highest association between the indices of HRV and obesity...
2017: Diabetes, Metabolic Syndrome and Obesity: Targets and Therapy
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