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https://www.readbyqxmd.com/read/29327348/respiratory-dysfunction-progresses-with-age-in-kcna1-null-mice-a-model-of-sudden-unexpected-death-in-epilepsy
#1
Kristina A Simeone, Jodi Hallgren, Charles S Bockman, Ankita Aggarwal, Vikash Kansal, Lauren Netzel, Shruthi H Iyer, Stephanie A Matthews, Malavika Deodhar, Peter J Oldenburg, Peter W Abel, Timothy A Simeone
OBJECTIVE: Increased breathing rate, apnea, and respiratory failure are associated with sudden unexpected death in epilepsy (SUDEP). We recently demonstrated the progressive nature of epilepsy and mortality in Kcna1-/- mice, a model of temporal lobe epilepsy and SUDEP. Here we tested the hypothesis that respiratory dysfunction progresses with age in Kcna1-/- mice, thereby increasing risk of respiratory failure and sudden death (SD). METHODS: Respiratory parameters were determined in conscious mice at baseline and following increasing doses of methacholine (MCh) using noninvasive airway mechanics (NAM) systems...
January 12, 2018: Epilepsia
https://www.readbyqxmd.com/read/29324693/inhibiting-the-physiological-stress-effects-of-a-sustained-attention-task-on-shoulder-muscle-activity
#2
Fiona Wixted, Cliona O'Riordan, Leonard O'Sullivan
OBJECTIVE: The objective of this study was to investigate if a breathing technique could counteract the effects of hyperventilation due to a sustained attention task on shoulder muscle activity. BACKGROUND: The trend towards higher levels of automation in industry is increasing. Consequently, manufacturing operators often monitor automated process for long periods of their work shift. Prolonged monitoring work requires sustained attention, which is a cognitive process that humans are typically poor at and find stressful...
January 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29322289/the-interaction-between-asthma-and-anxiety-an-interpretative-phenomenological-analysis-of-young-people-s-experiences
#3
Eleni Pateraki, Yvonne Vance, Paul Graham Morris
Asthma and anxiety are highly co-morbid, and their interaction leads to exacerbations for both conditions. This study explored the interplay between these two conditions from the perspective of children and adolescents. The objective was to identify potential mechanisms of interaction between asthma and anxiety, and to derive improvements for prevention and treatment. Eleven semi-structured interviews of young people (aged 11-15), who met criteria for both asthma and anxiety, were analysed using interpretative phenomenological analysis...
January 10, 2018: Journal of Clinical Psychology in Medical Settings
https://www.readbyqxmd.com/read/29319732/a-fatal-and-metabolic-experimental-hemorrhagic-shock-in-immature-swine
#4
Simone Alves Dos Santos Ferreira, Ana Cristina de Moraes, Renato Giuseppe Giovanni Terzi, Evandro Luis Assis Ferreira, William Adalberto Silva, Marcos Mello Moreira
PURPOSE: To use blood lactate (BL) as an end-point metabolic marker for the begin resuscitation of volume replacement in experimental hemorrhagic shock. METHODS: Group I (n=7) was not bled (Control). Animals in Group II (n=7) were bled to a MAP of 30mmHg in thirty minutes. Hemodynamic and metabolic data were recorded at Baseline, at 30, 60 and 120 minutes after Baseline. The animals were intubated in spontaneous breathing (FIO2=0.21) with halothane. RESULTS: Group I all survived...
December 2017: Acta Cirúrgica Brasileira
https://www.readbyqxmd.com/read/29318938/pitt-hopkins-syndrome-a-review-of-current-literature-clinical-approach-and-23-patient-case-series
#5
Kimberly Goodspeed, Cassandra Newsom, Mary Ann Morris, Craig Powell, Patricia Evans, Sailaja Golla
Pitt-Hopkins syndrome (PTHS) is a rare, genetic disorder caused by a molecular variant of TCF4 which is involved in embryologic neuronal differentiation. PTHS is characterized by syndromic facies, psychomotor delay, and intellectual disability. Other associated features include early-onset myopia, seizures, constipation, and hyperventilation-apneic spells. Many also meet criteria for autism spectrum disorder. Here the authors present a series of 23 PTHS patients with molecularly confirmed TCF4 variants and describe 3 unique individuals...
January 1, 2018: Journal of Child Neurology
https://www.readbyqxmd.com/read/29288644/out-of-thin-air-hyperventilation-triggered-seizures
#6
Kathryn A Salvati, Mark P Beenhakker
Voluntary hyperventilation triggers seizures in the vast majority of people with absence epilepsy. The mechanisms that underlie this phenomenon remain unknown. Herein, we review observations - many made long ago - that provide insight into the relationship between breathing and absence seizures.
December 27, 2017: Brain Research
https://www.readbyqxmd.com/read/29247426/asthma-a-disease-of-how-we-breathe-role-of-breathing-exercises-and-pranayam
#7
Jhuma Sankar, Rashmi Ranjan Das
To describe the role of breathing exercises or yoga and/or pranayama in the management of childhood asthma. We conducted an updated literature search and retrieved relevant literature on the role of breathing exercises or yoga and/or pranayama in the management of childhood asthma. We found that the breathing exercises or yoga and/or pranayama are generally multi-component packaged interventions, and are described as follows: Papworth technique, Buteyko technique, Yoga and/or Pranayam. These techniques primarily modify the pattern of breathing to reduce hyperventilation resulting in normalisation of CO2 level, reduction of bronchospasm and resulting breathlessness...
December 16, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/29246741/influence-of-chest-compression-artefact-on-capnogram-based-ventilation-detection-during-out-of-hospital-cardiopulmonary-resuscitation
#8
Mikel Leturiondo, Sofía Ruiz de Gauna, Jesus M Ruiz, J Julio Gutiérrez, Luis A Leturiondo, Digna M González-Otero, James K Russell, Dana Zive, Mohamud Daya
BACKGROUND: Capnography has been proposed as a method for monitoring the ventilation rate during cardiopulmonary resuscitation (CPR). A high incidence (above 70%) of capnograms distorted by chest compression induced oscillations has been previously reported in out-of-hospital (OOH) CPR. The aim of the study was to better characterize the chest compression artefact and to evaluate its influence on the performance of a capnogram-based ventilation detector during OOH CPR. METHODS: Data from the MRx monitor-defibrillator were extracted from OOH cardiac arrest episodes...
December 12, 2017: Resuscitation
https://www.readbyqxmd.com/read/29189269/comparison-of-transcranial-doppler-and-ultrasound-tagged-near-infrared-spectroscopy-for-measuring-relative-changes-in-cerebral-blood-flow-in-human-subjects
#9
Michael S Lipnick, Elizabeth A Cahill, John R Feiner, Philip E Bickler
BACKGROUND: Currently, no reliable method exists for continuous, noninvasive measurements of absolute cerebral blood flow (CBF). We sought to determine how changes measured by ultrasound-tagged near-infrared spectroscopy (UT-NIRS) compare with changes in CBF as measured by transcranial Doppler (TCD) in healthy volunteers during profound hypocapnia and hypercapnia. METHODS: Ten healthy volunteers were monitored with a combination of TCD, UT-NIRS (c-FLOW, Ornim Medical), as well as heart rate, blood pressure, end-tidal PCO2 (PEtCO2), end-tidal O2, and inspired O2...
November 14, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29148891/hyperventilation-and-breath-holding-test-with-indocyanine-green-kinetics-predicts-cerebral-hyperperfusion-after-carotid-artery-stenting
#10
Ichiro Nakagawa, Shohei Yokoyama, Daisuke Wajima, Fumihiko Nishimura, Shuichi Yamada, Hiroshi Yokota, Yasushi Motoyama, Young Su Park, Takeshi Wada, Kimihiko Kichikawa, Hiroyuki Nakase
Cerebral hyperperfusion syndrome (CHS) is a serious complication following carotid artery stenting (CAS), but definitive early prediction of CHS has not been established. Here, we evaluated whether indocyanine green kinetics and near-infrared spectroscopy (ICG-NIRS) with hyperventilation (HV) and the breath-holding (BH) test can predict hyperperfusion phenomenon after CAS. The blood flow index (BFI) ratio during HV and BH was prospectively monitored using ICG-NIRS in 66 patients scheduled to undergo CAS. Preoperative cerebrovascular reactivity (CVR) and the postoperative asymmetry index (AI) were also assessed with single-photon emission computed tomography before and after CAS and the correlation with the BFI HV/rest ratio, BFI BH/rest ratio was evaluated...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29143502/-exercise-induced-bronchoconstriction-epidemiology-physiopathology-and-management
#11
Fabienne Reinhard-Groebli, Laurent P Nicod
Exercise-induced bronchoconstriction, associated or not with asthma, describes a transient limitation of airflow in the airways occurring during or after physical activity, regardless of age or training. Bronchoconstriction on exertion is principally induced by thermal and fluid losses of the bronchial mucosa by hyperventilation of large air volumes. Respiratory symptoms are variable and not specific. Among bronchial provocation test, eucapnic voluntary hyperventilation owns the best sensitivity and specificity in the diagnosis of exercise-induced bronchoconstriction...
November 15, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/29138547/efficacy-of-tiotropium-and-indacaterol-monotherapy-and-their-combination-on-dynamic-lung-hyperinflation-in-copd-a-random-open-label-crossover-study
#12
Keisaku Fujimoto, Haruna Yamazaki, Midori Ura, Yoshiaki Kitaguchi
Background and objective: The difference in efficacy of long-acting muscarinic antagonists (LAMAs) and long-acting β2-agonists (LABAs) for dynamic lung hyperinflation (DLH) in COPD is unclear. The purpose of this study was to elucidate the difference in efficacy of LAMA and LABA alone and the combination thereof for DLH. Subjects and methods: Thirty stable patients were enrolled and randomly divided into two groups following baseline measurements. One group was treated with 5 μg tiotropium (Respimat inhaler) for 4 weeks following a 4-week treatment with 150 μg indacaterol, while the other group was treated with indacaterol for 4 weeks following a 4-week treatment with tiotropium...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/29125380/breathing-pattern-recordings-using-respiratory-inductive-plethysmography-before-and-after-a-physiotherapy-breathing-retraining-program-for-asthma-a-case-report
#13
Rokhsaneh Tehrany, Ruth DeVos, Anne Bruton
Breathing retraining (BR) improves symptoms, psychological well-being and quality of life in adults with asthma; but there remains uncertainty as to mechanism of effect. One of the intuitively logical theories is that BR works through altering breathing pattern. There is currently no evidence, however, that BR does result in measurable changes in breathing pattern. In this case report we describe the effects of physiotherapy BR on a 57-year-old female with a 10-year history of asthma. Data were collected before and after a physiotherapy BR program comprising three sessions over 18 weeks: breathing pattern (respiratory inductive plethysmography (RIP); physiology (end tidal carbon dioxide (ETCO2), heart rate, oxygen saturations, spirometric lung function); questionnaires (Asthma Control Questionnaire (ACQ), Hospital Anxiety and Depression Score, Nijmegen Questionnaire); and medication usage...
November 10, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29124322/air-breathing-changes-the-pattern-for-temperature-induced-ph-regulation-in-a-bimodal-breathing-teleost
#14
Christian Damsgaard, Mikkel Thy Thomsen, Mark Bayley, Tobias Wang
It is well established that ectothermic vertebrates regulate a lower arterial pH when temperature increases. Typically, water-breathers reduce arterial pH by altering plasma [HCO3(-)], whilst air-breathers rely on ventilatory adjustments to modulate arterial PCO2. However, no studies have investigated whether the shift from water- to air-breathing within a species changes the mechanisms for temperature-induced pH regulation. Here, we used the striped catfish Pangasianodon hypophthalmus to examine how pH regulation is affected by water- versus air-breathing, since P...
November 9, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/29123563/the-lives-and-works-of-john-cheyne-1777-1836-and-william-stokes-1804-1878
#15
Alexander Fletcher, Dominic Moor
Cheyne-Stokes respiration - an abnormal pattern of breathing, oscillating between hyperventilation and apnoea - was first described in the 19th century by Dr John Cheyne and Dr William Stokes. Although primarily known for this condition, both men contributed a lot more to the understanding and practice of medicine than this eponym.
November 2017: Journal of the Intensive Care Society
https://www.readbyqxmd.com/read/29116603/leigh-syndrome-in-individuals-bearing-m-9185t-c-mtatp6-variant-is-hyperventilation-a-factor-which-starts-its-development
#16
Dorota Piekutowska-Abramczuk, Rafał Rutyna, Elżbieta Czyżyk, Elżbieta Jurkiewicz, Katarzyna Iwanicka-Pronicka, Dariusz Rokicki, Sylwia Stachowicz, Joanna Strzemecka, Wiesław Guz, Michał Gawroński, Aneta Kosierb, Joanna Ligas, Mateusz Puchala, Anna Drelich-Zbroja, Małgorzata Bednarska-Makaruk, Wojciech Dąbrowski, Elżbieta Ciara, Janusz B Książyk, Ewa Pronicka
Leigh syndrome (LS), subacute necrotizing encephalomyelopathy is caused by various genetic defects, including m.9185T>C MTATP6 variant. Mechanism of LS development remains unknown. We report on the acid-base status of three patients with m.9185T>C related LS. At the onset, it showed respiratory alkalosis, reflecting excessive respiration effort (hyperventilation with low pCO2). In patient 1, the deterioration occurred in temporal relation to passive oxygen therapy. To the contrary, on the recovery, she demonstrated a relatively low respiratory drive, suggesting that a "hypoventilation" might be beneficial for m...
November 7, 2017: Metabolic Brain Disease
https://www.readbyqxmd.com/read/29095325/charcot-marie-tooth-disease-1x-simulating-paraparetic-guillain-barre-syndrome
#17
Dimitrios Parissis, Panagiotis Ioannidis, Georgios Papadopoulos, Dimitrios Karacostas
X-linked Charcot-Marie-Tooth disease (CMT 1X) is the second most common form of inherited demyelinating neuropathy. It is established that patients suffering from CMT 1X can have episodes of hemiparesis, paraparesis, quadriparesis, ataxia, aphasia, and dysarthria, which can be fully reversible, and 'trigger' factors for these episodes are usually febrile illness, high altitudes, hyperventilation, and physical activity. We describe a 22-year-old patient with a history of viral infection and sleep deprivation who presented to our department because of acute difficulty in walking and neurophysiological findings suggesting Guillain-Barre syndrome...
November 2017: Neurologist
https://www.readbyqxmd.com/read/29074702/respiratory-consequences-of-targeted-losses-of-hoxa5-gene-function-in-mice
#18
Kim Landry-Truchon, Stéphanie Fournier, Nicolas Houde, Jean-Philippe Rousseau, Lucie Jeannotte, Richard Kinkead
Fetal development of the respiratory tract and diaphragm requires strict coordination between genetically controlled signals and mechanical forces produced by the neural network that generates breathing. Being expressed in the mesenchyme of trachea, lung and diaphragm, and in phrenic motoneurons HOXA5 is a key transcription factor regulating lung development and function. Consequently, most Hoxa5(-/-) mutants die at birth from respiratory failure. However, the extensive effect of the null mutation makes it difficult to identify the origins of respiratory dysfunction in newborns...
October 26, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29060734/comparison-of-motion-based-analysis-to-thermal-based-analysis-of-thermal-video-in-the-extraction-of-respiration-patterns
#19
Stephanie L Bennett, Rafik Goubran, Frank Knoefel
Non-contact methods of extracting vital signals has become a popular area of research. This is likely due to the world's aging population and the increased need for long term and remote monitoring. This paper examines and compares the potential for one modality to capture a vital sign, specifically respiration, in the presence of signal abnormalities. This paper compares temperature based-methods to motion-based methods of extracting respiration rate from thermal video of a subject performing computationally difficult respiration tests...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29054017/hyperventilation-and-electroconvulsive-therapy-a-literature-review
#20
REVIEW
Jorge Gómez-Arnau, Aida de Arriba-Arnau, Javier Correas-Lauffer, Mikel Urretavizcaya
BACKGROUND: Hyperventilation has been proposed as an augmentation strategy in electroconvulsive therapy (ECT) in accordance with its proconvulsant effect. OBJECTIVE: This study reviews the existing literature on the application of hyperventilation in ECT, its efficacy, and tolerance. METHODS: A systematic search was performed in PubMed and EMBASE databases. Search terms ('electroconvulsive therapy' and 'hyperventilation', 'ventilation', 'hyperoxygenation', 'hyperoxia', 'hypocapnia') were used to retrieve works from 1966 to June 2016...
September 23, 2017: General Hospital Psychiatry
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