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Autonomic Neuroscience: Basic & Clinical

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https://www.readbyqxmd.com/read/29778304/postural-orthostatic-tachycardia-syndrome-in-children-and-adolescents
#1
REVIEW
Jeffrey R Boris
Postural orthostatic tachycardia syndrome (POTS) affects up to 3,000,000 people in the United States, with at least one-third of them developing POTS before the age of 18. POTS as a disorder is similar in adult and pediatric populations, but there are factors specific to pediatric patients that affect how it presents and how it is experienced that make pediatric POTS different. This review discusses the both the similarities in this population to their adult counterparts and the unique challenges faced by pediatric POTS patients, including management of schooling and education as well as the complex interactions between these pediatric patients and their parents...
May 12, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29784553/postural-orthostatic-tachycardia-syndrome-during-pregnancy-a-systematic-review-of-the-literature
#2
REVIEW
Kate Morgan, Catherine Chojenta, Meredith Tavener, Angela Smith, Deb Loxton
PURPOSE: Postural Orthostatic Tachycardia Syndrome is most commonly seen in women of child bearing age, however little is known about its effects in pregnancy. METHOD: A systematic review was conducted in March 2015 and updated in February 2018. Medline, Embase, PsychInfo, CINHAL, and the Cochrane Library were searched from database inception. The ClinicalTrials.gov site and bibliographies were searched. MeSH and Emtree headings and keywords included; Postural Orthostatic Tachycardia Syndrome, Postural Tachycardia Syndrome, and were combined with pregnancy and pregnancy related subject headings and keywords...
May 9, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29773483/sleep-disorders-in-patients-with-postural-tachycardia-syndrome-a-review-of-the-literature-and-guide-for-clinicians
#3
REVIEW
Mitchell G Miglis, Fiona Barwick
Fatigue is common in POTS, and patients often report unrefreshing sleep. These symptoms are directly correlated with a reduced quality of life, however the treatment of sleep disorders in this population remains a challenge. This article will review the current literature on the prevalence of sleep disorders in POTS, their association with the underlying pathophysiology of POTS, and current treatment paradigms.
May 8, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29753556/pharmacotherapy-for-postural-tachycardia-syndrome
#4
REVIEW
Amanda J Miller, Satish R Raj
Postural tachycardia syndrome (POTS) is a disorder characterized by the presence of orthostatic symptoms (including lightheadedness, palpitations, nausea, dyspnea, and tremulousness) as well as excessive upright tachycardia. POTS predominantly affects women of childbearing age. Treating POTS involves a multi-faceted approach using non-pharmacological and pharmacological interventions. There are no pharmacological treatments that are currently United States Food and Drug Administration (FDA) approved for POTS due to lack of randomized controlled trials...
May 4, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29705015/evaluation-of-postural-tachycardia-syndrome-pots
#5
REVIEW
Brent P Goodman
The diagnostic evaluation of a patient with suspected postural tachycardia syndrome (POTS) requires a thoughtful diagnostic approach utilizing a careful clinical history and examination, laboratory, and autonomic testing. This article outlines the importance of a thorough history in identifying mechanism of symptom onset, clinical features, associated clinical conditions or disorders, and factors that may result in symptom exacerbation. The clinical examination involves an assessment of pupillary responses, an evaluation for sudomotor and vasomotor signs, and an assessment for joint hypermobility...
April 22, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29678416/surgical-and-dental-considerations-in-patients-with-postural-tachycardia-syndrome
#6
Mohammed Ruzieh, Mark Dziuba, James P Hofmann, Blair P Grubb
No abstract text is available yet for this article.
April 13, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29628432/cognitive-and-psychological-issues-in-postural-tachycardia-syndrome
#7
REVIEW
Vidya Raj, Morwenna Opie, Amy C Arnold
Postural tachycardia syndrome (POTS) is one of the most common forms of chronic orthostatic intolerance. In addition to orthostatic symptoms, many POTS patients report incapacitating cognitive dysfunction or "brain fog" even while lying down or seated. Consistent with these subjective reports, there is accruing objective evidence of specific cognitive difficulties in POTS, with studies showing mild to moderate cognitive impairment using standardized neuropsychological assessment batteries. The precise profile of cognitive dysfunction in POTS patients has been shown to vary among these studies potentially due to the neuropsychological tests used, postural position, comorbidities and length of illness, inclusion of adolescent versus adult patients, and sites of recruitment...
March 27, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29559204/special-issue-for-the-silver-anniversary-of-postural-tachycardia-syndrome
#8
REVIEW
Satish R Raj, Lauren E Stiles
Postural Tachycardia Syndrome (POTS) is a multi-system disorder that can be associated with significant functional disability. Likely due to the multi-system nature of the disorder, it can be difficult for physicians caring for these patients with POTS to know enough about the management of problems that fall within so many different specialties. This special issue was written for these clinicians and their patients. We have brought together experts on POTS with different backgrounds to share their approach to many of the medical issues that confront patients with POTS...
March 15, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29519642/universal-characteristics-of-evolution-and-development-are-inherent-in-fetal-autonomic-brain-maturation
#9
Alexander Schmidt, Ernst G Schukat-Talamazzini, Janine Zöllkau, Adelina Pytlik, Sophia Leibl, Kathrin Kumm, Franziska Bode, Isabelle Kynass, Otto W Witte, Ekkehard Schleussner, Uwe Schneider, Dirk Hoyer
Adverse prenatal environmental influences to the developing fetus are associated with mental and cardiovascular disease in later life. Universal developmental characteristics such as self-organization, pattern formation, and adaptation in the growing information processing system have not yet been sufficiently analyzed with respect to description of normal fetal development and identification of developmental disturbances. Fetal heart rate patterns are the only non-invasive order parameter of the developing autonomic brain available with respect to the developing complex organ system...
March 5, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29519641/postural-tachycardia-syndrome-and-other-forms-of-orthostatic-intolerance-in-ehlers-danlos-syndrome
#10
REVIEW
Maria Roma, Colleen L Marden, Inge De Wandele, Clair A Francomano, Peter C Rowe
OBJECTIVE: To review the association between orthostatic intolerance syndromes and both joint hypermobility and Ehlers-Danlos syndrome, and to propose reasons for identifying hereditary connective tissue disorders in those with orthostatic intolerance in the context of both clinical care and research. METHODS: We searched the published peer-reviewed medical literature for papers reporting an association between joint hypermobility or Ehlers-Danlos syndrome and orthostatic intolerance...
March 5, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29530592/postural-orthostatic-tachycardia-syndrome-pots-in-denmark-increasingly-recognized-or-new-epidemic
#11
Louise Brinth, Kirsten Pors, Jasmina Medic Spahic, Richard Sutton, Artur Fedorowski, Jesper Mehlsen
AIMS: The incidence of Postural Orthostatic Tachycardia Syndrome (POTS) has grown in recent years. Whether this is an emerging epidemic or increasing recognition is unclear. METHODS: We retrospectively examined 8790 tilt-table tests (HUT) performed between 1997 and 2014 in patients with orthostatic intolerance and/or suspected syncope. Tests were reclassified according to the current diagnostic criteria for POTS. The number of POTS diagnoses in proportion to the number of tilt tests performed per year was calculated...
March 3, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29523389/postural-tachycardia-syndrome-diagnosis-physiology-and-prognosis
#12
REVIEW
Amy C Arnold, Jessica Ng, Satish R Raj
Postural tachycardia syndrome (POTS) is a heterogeneous clinical syndrome that has gained increasing interest over the past few decades due to its increasing prevalence and clinical impact on health-related quality of life. POTS is clinically characterized by sustained excessive tachycardia upon standing that occurs in the absence of significant orthostatic hypotension and other medical conditions and or medications, and with chronic symptoms of orthostatic intolerance. POTS represents one of the most common presentations of syncope and presyncope secondary to autonomic dysfunction in emergency rooms and in cardiology, neurology, and primary care clinics...
February 28, 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29778243/contextual-modulation-of-autonomic-pain-reactivity
#13
Camille Fauchon, Vincent Pichot, Isabelle Faillenot, Benjamin Pommier, Luis Garcia-Larrea, Roland Peyron, Florian Chouchou
Although modulation of cardiac activity may be influenced by several factors, interaction between autonomic nociceptive responses and the high-level of cortical processes is not clearly understood. Here, we studied in 26 subjects whether empathetic or unempathetic contexts could interact with autonomic pain responses. RR intervals variability was used to approach parasympathetic and sympathetic responses to painful thermal stimulations, according to contexts evoked by experimenters' comments. We observed that unempathetic context increased sympathetic reactivity to comments and to painful stimulations without any parasympathetic change...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29778242/cardiovascular-responses-to-isometric-handgrip-exercise-in-young-patients-with-recurrent-vasovagal-syncope
#14
Juan Idiaquez, Juan Francisco Idiaquez, Rodrigo Iturriaga
OBJECTIVE: Arterial blood pressure (BP) increased in healthy humans in response to isometric handgrip (IHG), but the pattern of the relative contribution of cardiac output (CO) and total peripheral resistance (TPR) changes to the pressor response is different among individuals. We investigated weather patients with recurrent vasovagal syncope (VVS) have a similar pattern of individual CO, TPR and pressor responses to IHG, as healthy subjects. METHODS: 32 patients (27...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29778241/dual-autonomic-inhibitory-action-of-central-apelin-on-gastric-motor-functions-in-rats
#15
Mehmet Bülbül, Osman Sinen
Centrally administered apelin has been shown to inhibit gastric emptying (GE) in rodents, however, the relevant mechanism has been investigated incompletely. Using male Wistar rats, we investigated the efferent pathways involved in gastroinhibitory action of central apelin. Stereotaxic intracerebroventricular (icv) cannulation, subdiaphragmatic vagotomy (VGX) and/or celiac ganglionectomy (CGX) were performed 7 days prior to the experiments. Apelin-13 was administered (30 nmol, icv) 90 min prior to GE measurement...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29778240/the-autonomic-neural-mechanism-of-right-ventricular-outflow-tract-tachycardia
#16
Hung-Yu Chang, Li-Wei Lo, Yu-Ruey Chen, Yu-Hui Chou, Wei-Lun Lin, Yenn-Jiang Lin, Wei-Hsian Yin, An-Ning Feng, Shih-Ann Chen
BACKGROUND: Ventricular tachycardia (VT) and ventricular premature complexes (VPCs) originating from the right ventricular outflow tract (RVOT) are generally considered as benign arrhythmias, with ECG morphology showing LBBB pattern and inferior axis. Pathogenic mechanisms in the genesis of RVOT VT/VPC remain largely unknown. We aimed to investigate the neural mechanism in RVOT ventricular arrhythmias in canine model. METHODS: Twelve mongrel dogs (13.7 ± 1...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29778239/time-dependent-changes-in-cardiorespiratory-functions-of-anesthetized-rats-exposed-to-sustained-hypoxia
#17
Kouki Kato, Ryosuke Morinaga, Seigo Fushuku, Nobuaki Nakamuta, Yoshio Yamamoto
Although cardiovascular responses may be altered by respiratory changes under prolonged hypoxia, the relationship between respiratory and cardiovascular changes remains unknown. The aim of the present study is to clarify cardiorespiratory changes in anesthetized rats during and after hypoxic conditions using simultaneous recordings of cardiorespiratory variables with 20-sec recording intervals. After air breathing for 20 min (pre-exposure period), rats were subjected to 10% O2 for 2 h (hypoxic exposure period) and then air for 30 min (recovery period)...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29311010/present-and-future-of-disease-modifying-therapies-in-multiple-system-atrophy
#18
REVIEW
Miguel Lopez-Cuina, Alexandra Foubert-Samier, François Tison, Wassilios G Meissner
Through the last decade seven clinical trials on Multiple System Atrophy have been published, virtually all of them reported negative results. Patients and family remain hopeful while facing this devastating disease, but as doctors we still cannot offer them disease-modifying therapies. The field has seen many advances regarding pathophysiology, translational research, diagnostic accuracy, natural history and imaging, but successful treatment remains elusive. This review provides an overview of the available tools for designing clinical trials, critically analyzes the past studies and describes the knowledge obtained from them, and finally gives some orientation for future trials that could meet the current needs of patients and clinicians, overcoming the hurdles met by previous studies...
May 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29269241/multiple-system-atrophy-building-a-global-community-30years-of-advocacy-efforts
#19
REVIEW
Pamela G Bower
Multiple system atrophy (MSA) is a rare, progressive and ultimately fatal neurodegenerative disease with no known cause and no available disease modifying treatment. Known previously by various names including Shy-Drager Syndrome, olivopontocerebellar atrophy (OPCA) and striatonigral degeneration, MSA can be classified simultaneously as a movement disorder, an autonomic disorder, a cerebellar ataxia and an atypical parkinsonian disorder. Despite scholarly attempts to better describe the disease, awareness among medical practitioners about multiple system atrophy as a diagnostic possibility has been slow to catch on...
May 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29169744/the-neuropathology-of-multiple-system-atrophy-and-its-therapeutic-implications
#20
REVIEW
Elvira Valera, Eliezer Masliah
Multiple system atrophy (MSA) is a fatal neurodegenerative disorder characterized by the abnormal accumulation of toxic forms of the synaptic protein alpha-synuclein (α-syn) within oligodendrocytes and neurons. The presence of α-syn within oligodendrocytes in the form of glial cytoplasmic inclusions is the diagnostic hallmark of MSA. However, it has been postulated that α-syn is produced in neurons and propagates to oligodendrocytes, where unknown mechanisms lead to its accumulation. The presence of α-syn within neurons in MSA has not been so extensively studied, but it may shed light into neuropathological mechanisms leading to oligodendroglial accumulation...
May 2018: Autonomic Neuroscience: Basic & Clinical
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