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https://www.readbyqxmd.com/read/28923061/sinuscor-an-advanced-tool-for-heart-rate-variability-analysis
#1
Rhenan Bartels, Leonardo Neumamm, Tiago Peçanha, Alysson Roncally Silva Carvalho
BACKGROUND: Heart rate variability (HRV) is a widespread non-invasive technique to assess cardiac autonomic function. Time and frequency domain analyses have been used in HRV studies, and their interpretations are linked with both clinical prognostic and diagnostic information. Statistical and geometrical parameters, Fast Fourier Transform and Autoregressive based periodograms are commonly used approaches for the assessment of stationary RR intervals (RRi) signals. However, some conditions result in non-stationary HRV behavior such as the "tilt test" and exercise...
September 18, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28911152/hypothalamic-glucose-transport-in-humans-during-experimentally-induced-hypoglycemia-associated-autonomic-failure
#2
Elizabeth R Seaquist, Amir Moheet, Anjali Kumar, Dinesh K Deelchand, Melissa Terpstra, Kristine Kubisiak, Lynn E Eberly, Pierre-Gilles Henry, James M Joers, Gülin Öz
Context: Upregulated brain glucose transport in response to recurrent hypoglycemia may contribute to the development of hypoglycemia-associated autonomic failure (HAAF) and impaired awareness of hypoglycemia. Whether recurrent hypoglycemia alters glucose transport in the hypothalamus is unknown. Objective: To test the hypothesis that hypothalamic glucose transport will increase in healthy volunteers preconditioned with recurrent hypoglycemia to induce HAAF. Setting: University medical center...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28904461/the-prevalence-and-severity-of-autonomic-dysfunction-in-chronic-inflammatory-demyelinating-polyneuropathy
#3
Suresh Babu Pasangulapati, T V Murthy, Ajith Sivadasan, L Rynjah Gideon, A T Prabhakar, Aaron Sanjith, Vivek Mathew, Mathew Alexander
INTRODUCTION: In chronic inflammatory demyelinating polyneuropathy (CIDP), emphasis has been on motor disabilities, and autonomic dysfunction in these patients has not been addressed systematically. MATERIALS AND METHODS: Autonomic function was prospectively analyzed in 38 patients with CIDP. Quantitative autonomic function testing was done using Finometer(®) PRO and severity of adrenergic and cardiovagal dysfunction graded according to composite autonomic severity score and sudomotor dysfunction assessed using sympathetic skin response...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28904457/delayed-orthostatic-hypotension-a-pilot-study-from-india
#4
Arun Grace Roy, Siby Gopinath, Suresh Kumar, Sudheeran Kannoth, Anand Kumar
INTRODUCTION: Orthostatic hypotension is defined as a sustained decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within three minutes of standing compared with blood pressure from the sitting or supine position or by head-up tilt-table testing (1). When sustained blood pressure (BP) drop is after three minutes of upright posture it is called delayed orthostatic hypotension (delayed OH) (2). AIM OF THE STUDY: To detect the incidence of delayed orthostatic hypotension in patients referred to our autonomic lab...
July 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/28903493/editor-s-highlight-formulation-and-toxicology-evaluation-of-the-intrathecal-ayx1-dna-decoy-in-sprague-dawley-rats
#5
Julien Mamet, David C Yeomans, Tony L Yaksh, Donald C Manning, Scott Harris
The longevity of pain after surgery is debilitating and limits the recovery of patients. AYX1 is a double-stranded, unprotected, 23 base-pair oligonucleotide designed to reduce acute post-surgical pain and prevent its chronification with a single intrathecal perioperative dose. AYX1 mimics the DNA sequence normally bound by EGR1 on chromosomes, a transcription factor transiently induced in the dorsal root ganglia-spinal cord network following a noxious input. AYX1 binds to EGR1 and prevents it from launching waves of gene regulation that are necessary to maintain pain over time...
September 1, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28893208/trial-design-and-rationale-for-apollo-a-phase-3-placebo-controlled-study-of-patisiran-in-patients-with-hereditary-attr-amyloidosis-with-polyneuropathy
#6
David Adams, Ole B Suhr, Peter J Dyck, William J Litchy, Raina G Leahy, Jihong Chen, Jared Gollob, Teresa Coelho
BACKGROUND: Patisiran is an investigational RNA interference (RNAi) therapeutic in development for the treatment of hereditary ATTR (hATTR) amyloidosis, a progressive disease associated with significant disability, morbidity, and mortality. METHODS: Here we describe the rationale and design of the Phase 3 APOLLO study, a randomized, double-blind, placebo-controlled, global study to evaluate the efficacy and safety of patisiran in patients with hATTR amyloidosis with polyneuropathy...
September 11, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28892566/brain-heart-interactions-reveal-consciousness-in-non-communicating-patients
#7
Federico Raimondo, Benjamin Rohaut, Athena Demertzi, Melanie Valente, Denis Engemann, Moti Salti, Diego Fernandez Slezak, Lionel Naccache, Jacobo D Sitt
Objective We here aimed at characterizing heart-brain interactions in patients with disorders of consciousness. We tested how this information impacts data-driven classification between unresponsive and minimally conscious patients. Methods A cohort of 127 patients in vegetative state/unresponsive wakefulness syndrome (VS/UWS, n=70) and minimally conscious state (MCS, n=57) were presented with the 'Local-Global' auditory oddball paradigm, which distinguishes two levels of processing: short-term deviation of local auditory regularities and global long-term rule violations...
September 11, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28887710/increased-mortality-in-patients-with-adrenal-incidentalomas-and-autonomous-cortisol-secretion-a-13-year-retrospective-study-from-one-center
#8
Jekaterina Patrova, Magnus Kjellman, Hans Wahrenberg, Henrik Falhammar
PURPOSE: To compare long-term outcomes in patients with adrenal incidentalomas (AIs) with the response to a 1 mg overnight dexamethasone suppression test (DST). METHODS: Consecutive patients with "non-functional" AIs (n = 365) were examined. Patients with overt hormone excess, adrenocortical cancer and known malignancy had been excluded. Patients were classified to normal cortisol secretion group (n = 204, DST ≤ 50 nmol/l), possible autonomous cortisol secretion group (n = 128, DST 51-138 nmol/l) and autonomous cortisol secretion group (n = 33, DST ≥ 138 nmol/l)...
September 8, 2017: Endocrine
https://www.readbyqxmd.com/read/28887017/establishment-and-activity-of-the-d-quadrant-organizer-in-the-marine-gastropod-crepidula-fornicata
#9
Jonathan Q Henry, Deirdre C Lyons, Kimberly J Perry, Chen Cornelia Osborne
During development in metazoan embryos, the fundamental embryonic axes are established by organizing centers that influence the fates of nearby cells. Among the spiralians, a large and diverse branch of protostome metazoans, studies have shown that an organizer sets up the dorsal-ventral axis, which arises from one of the four basic cell quadrants during development (the dorsal, D quadrant). Studies in a few species have also revealed variation in terms of how and when the D quadrant and the organizer are established...
September 5, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28884982/comparison-of-somatic-and-sudomotor-nerve-fibers-in-type-2-diabetes-mellitus
#10
Eun Hee Sohn, Kyu Sang Song, Ju Yeon Lee, Ae Young Lee
BACKGROUND AND PURPOSE: The objective of this study was to find a sensitive method for the early detection of diabetic polyneuropathy (DPN) and determine the relationship between the functions of somatic and autonomic small nerve fibers in DPN. METHODS: Patients with type 2 diabetes mellitus and DPN based on clinical symptoms, signs, intraepidermal nerve fiber density (IENFD), and findings in the quantitative sudomotor axon reflex test (QSART) were enrolled retrospectively...
September 4, 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/28884386/association-between-cardiac-autonomic-control-and-cognitive-performance-among-patients-post-stroke-and-age-matched-healthy-controls-an-exploratory-pilot-study
#11
Noa Raphaely Beer, Nachum Soroker, Nathan M Bornstein, Michal Katz Leurer
Associations between autonomic nervous system health and cognitive performance have been described in different populations. Autonomic disturbances are a common phenomenon in patients post stroke. Little is known about the relationship between post stroke disturbances of the autonomic nervous system and the commonly occurring disturbances of cognitive functions revealed by victims of stroke. To assess the association between heart rate variability (HRV) and cognitive performance among patients post ischemic stroke and healthy age-matched controls, 13 patients post first-ever ischemic stroke aged 40-80 years and 15 age-matched healthy controls were evaluated...
September 7, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28874084/impaired-vagal-activity-to-meal-in-patients-with-functional-dyspepsia-and-delayed-gastric-emptying
#12
W-J Guo, S-K Yao, Y-L Zhang, S-Y Du, H-F Wang, L-J Yin, H-L Li
Objective This study was performed to investigate impaired vagal activity to meal in patients with functional dyspepsia (FD) with delayed gastric emptying (GE). Methods Eighty-five patients were studied. GE parameters, including those in the overall and proximal stomach, were measured by GE functional tests at the Department of Nuclear Medicine. Autonomic nervous function was tested by spectral analysis of heart rate variability (HRV). The vagal activity and sympathetic activity were analyzed by recording the power in the high-frequency component (HF), low-frequency component (LF), and LF/HF ratio...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28873397/long-term-intra-individual-reproducibility-of-heart-rate-dynamics-during-exercise-and-recovery-in-the-uk-biobank-cohort
#13
Michele Orini, Andrew Tinker, Patricia B Munroe, Pier D Lambiase
BACKGROUND: The heart rate (HR) response to exercise provides useful information about the autonomic function and has prognostic value, but its reproducibility over a long period of time, a critical requirement for using it as a clinical biomarker, is undetermined. AIM: To determine the intra-individual reproducibility of HR dynamics during sub-maximum exercise and one minute recovery. METHODS: 1187 individuals from the Cardio physical fitness assessment test of the UK Biobank repeated a standard exercise stress test twice (recall time 34...
2017: PloS One
https://www.readbyqxmd.com/read/28864843/pupillary-autonomic-dysfunction-in-patients-with-anca-associated-vasculitis
#14
Philipp Moog, O Eren, S Kossegg, K Valda, A Straube, M Grünke, H Schulze-Koops, M Witt
OBJECTIVE: To assess autonomic function by infrared dynamic pupillometry in patients with ANCA-vasculitis (AAV) in correlation to autonomic symptoms, disease specific clinical parameters and cardiovascular reflex tests. METHODS: Patients with AAV and healthy controls underwent pupillometry at rest and after sympathetic stimulation (cold pressor test). Three parasympathetic parameters (amplitude, relative amplitude, maximum constriction velocity) and one sympathetic parameter (late dilatation velocity) were assessed...
September 1, 2017: Clinical Autonomic Research: Official Journal of the Clinical Autonomic Research Society
https://www.readbyqxmd.com/read/28863348/biological-and-perceived-stress-in-motor-functional-neurological-disorders
#15
Kalliopi Apazoglou, Viridiana Mazzola, Jennifer Wegrzyk, Giulia Frasca Polara, Selma Aybek
BACKGROUND: Current models explaining motor functional neurological disorders (FND) integrate both the neurobiological mechanisms underlying symptoms production and the role of psychosocial stressors. Imaging studies have suggested abnormal motor control linked to impaired emotional and stress regulation. However, little is known on the biological stress regulation in FND. Our aim was to study the biological and perceived response to stress in patients with motor FND. METHODS: Sixteen patients with motor FND (DSM-5 criteria) and fifteen healthy controls underwent the Trier Social Stress Test...
August 29, 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28860606/effect-of-cortisol-diurnal-rhythm-on-emotional-memory-in-healthy-young-adults
#16
Mitsue Nagamine, Hiroko Noguchi, Nobuaki Takahashi, Yoshiharu Kim, Yutaka Matsuoka
Few studies have investigated the relationship between cortisol diurnal rhythm and cognitive function in healthy young adults, especially for emotional memory. To address this deficiency, this study examined the effect of diurnal cortisol slope (DCS) and heart rate variability (HRV) on emotional memory. Participants included healthy volunteers (44 men and 23 women; mean age 20.60 yrs). Participants were shown emotionally arousing slides and were asked to return to the laboratory one week later where they were given a "surprise" memory test to examine their emotional memory retention...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28859148/stellate-ganglion-block-attenuates-chronic-stress-induced-depression-in-rats
#17
Weiwei Wang, Weidong Shi, Hua Qian, Xijin Deng, Tong Wang, Wenzhi Li
BACKGROUND: Stress is a significant factor in the etiology of depression. Stellate ganglion block (SGB) has been shown to maintain the stability of the autonomic system and to affect the neuroendocrine system, including the hypothalamic-pituitary-adrenal (HPA) axis. The objective of this study was to determine the antidepressant-like effects of SGB on the autonomic system and the HPA axis, apoptosis-related proteins, related spatial learning and memory impairment, and sensorimotor dysfunction...
2017: PloS One
https://www.readbyqxmd.com/read/28841448/pre-crash-scenarios-at-road-junctions-a-clustering-method-for-car-crash-data
#18
Philippe Nitsche, Pete Thomas, Rainer Stuetz, Ruth Welsh
Given the recent advancements in autonomous driving functions, one of the main challenges is safe and efficient operation in complex traffic situations such as road junctions. There is a need for comprehensive testing, either in virtual simulation environments or on real-world test tracks. This paper presents a novel data analysis method including the preparation, analysis and visualization of car crash data, to identify the critical pre-crash scenarios at T- and four-legged junctions as a basis for testing the safety of automated driving systems...
August 22, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28838824/phlebectasia-in-a-finger-in-a-case-of-microscopic-polyangiitis-with-peripheral-polyneuropathy
#19
Jorge Julio Badía Flores, Federico G Arévalo Martínez
The patient was a 56-year-old man with microscopic polyangiitis and symmetrical peripheral polyneuropathy of the extremities who was positive for p-ANCA, EMG pattern of mononeuritis multiplex and skin biopsy showing the presence of nonspecific vasculitis. He had phlebectasia with plethora and tortuous vessels on dorsum of the fingers on both hands, paresis and hypoesthesia of fingers and toes with functional limitations. The administration of prednisone, azathioprine and a cyclophosphamide pulse achieved rapid improvement in the general symptoms, but the changes in the neuropathy occurred very slowly...
August 22, 2017: Reumatología Clinica
https://www.readbyqxmd.com/read/28835356/a-brain-phenotype-for-stressor-evoked-blood-pressure-reactivity
#20
Peter J Gianaros, Lei K Sheu, Fatma Uyar, Jayanth Koushik, J Richard Jennings, Tor D Wager, Aarti Singh, Timothy D Verstynen
BACKGROUND: Individuals who exhibit large-magnitude blood pressure (BP) reactions to acute psychological stressors are at risk for hypertension and premature death by cardiovascular disease. This study tested whether a multivariate pattern of stressor-evoked brain activity could reliably predict individual differences in BP reactivity, providing novel evidence for a candidate neurophysiological source of stress-related cardiovascular risk. METHODS AND RESULTS: Community-dwelling adults (N=310; 30-51 years; 153 women) underwent functional magnetic resonance imaging with concurrent BP monitoring while completing a standardized battery of stressor tasks...
August 23, 2017: Journal of the American Heart Association
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