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Hyperventilation

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https://www.readbyqxmd.com/read/29773418/-the-obstructive-sleep-apnoea-syndrome-is-not-only-bad-for-the-heart
#1
J Rajaoarifetra, A Palot, D Tissier Ducamp, C Tummino, M Gouitaa, P Chanez
Obstructive sleep apnoea (OSA) is common in the general population, particularly in the elderly. This syndrome is frequently responsible for severe cardiovascular complications. However, the indications for its treatment in the elderly remain controversial. We report the case of a 79-year-old man with severe, undiagnosed OSA who inhaled his fixed dental bridge during sleep. The inhaled foreign body came to rest in the lumen of the left main stem bronchus. The association of obesity with a body mass index of 30kg/m2 , snoring with breathing pauses reported by his partner, nocturia, morning headache and an Epworth score of 11 led to polysomnography which confirmed OSA with an apnoea/hypopnoea index of 53 per hour...
May 14, 2018: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/29745825/reply-to-parkes-effect-of-hypocapnia-on-the-sensitivity-of-hyperthermic-hyperventilation-and-the-cerebrovascular-response-in-resting-heated-humans
#2
Bun Tsuji, Davide Filingeri, Yasushi Honda, Tsubasa Eguchi, Naoto Fujii, Narihiko Kondo, Takeshi Nishiyasu
No abstract text is available yet for this article.
May 1, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29730991/feasibility-of-cardiovascular-magnetic-resonance-to-detect-oxygenation-deficits-in-patients-with-multi-vessel-coronary-artery-disease-triggered-by-breathing-maneuvers
#3
Kady Fischer, Kyohei Yamaji, Silvia Luescher, Yasushi Ueki, Bernd Jung, Hendrik von Tengg-Kobligk, Stephan Windecker, Matthias G Friedrich, Balthasar Eberle, Dominik P Guensch
BACKGROUND: Hyperventilation with a subsequent breath-hold has been successfully used as a non-pharmacological vasoactive stimulus to induce changes in myocardial oxygenation. The purpose of this pilot study was to assess if this maneuver is feasible in patients with multi-vessel coronary artery disease (CAD), and if it is effective at detecting coronary artery stenosis > 50% determined by quantitative coronary angiography (QCA). METHODS: Twenty-six patients with coronary artery stenosis (QCA > 50% diameter stenosis) underwent a contrast-free cardiovascular magnetic resonance (CMR) exam in the time interval between their primary coronary angiography and a subsequent percutaneous coronary intervention (PCI, n = 24) or coronary artery bypass (CABG, n = 2) revascularization procedure...
May 7, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29726590/changes-in-the-parameters-of-ventricular-repolarization-during-pre-apnea-apnea-and-post-apnea-periods-in-patients-with-obstructive-sleep-apnea
#4
Erdoğan Sökmen, Sinan Cemgil Özbek, Mustafa Çelik, Serkan Sivri, Mehmet Metin, Mustafa Avcu
BACKGROUND: Ventricular arrhythmias are reported to be more common in patients with obstructive sleep apnea (OSA). Preliminary evidence showed such parameters regarding ventricular repolarization as Tp-e, Tp-e/QT and Tp-e/QTc may be related with increased cardiac arrhythmias and even sudden cardiac death. The purpose of the present study was to evaluate ventricular repolarization during immediately pre-apnea period, apnea period and postapnea hyperventilation period in patients with OSA...
May 4, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29724380/exercise-induced-bronchospasm-in-children-and-adolescents-with-allergic-rhinitis-by-treadmill-and-hyperventilation-challenges
#5
Edil de Albuquerque Rodrigues Filho, José Ângelo Rizzo, Adriana Velozo Gonçalves, Marco Aurélio de Valois Correia Junior, Emanuel Sávio Cavalcanti Sarinho, Décio Medeiros
BACKGROUND: Respiratory complaints after exercise are common in patients with rhinitis. Exercise-induced bronchospasm (EIB) may be one of the causes. OBJECTIVES: To evaluate EIB prevalence in a group of children and adolescents with allergic rhinitis, to compare the treadmill running (TR) and eucapnic voluntary hyperventilation (EVH) challenge methods as diagnostic tools and to assess the association between respiratory complaints on exercise and EIB. METHODS: Patients aged between 10 and 20 years were studied at the Pulmonology Department of the Hospital das Clínicas -UFPE- Recife, Brazil...
May 2018: Respiratory Medicine
https://www.readbyqxmd.com/read/29718831/generalized-and-lateralized-rhythmic-patterns
#6
Sarah E Schmitt
The relationship between generalized and lateralized rhythmic delta activity (RDA) and seizures is more ambiguous than the relationship between periodic discharges and seizures. Although frontally predominant generalized RDA is not associated with seizures, occipitally predominant RDA may be associated with the absence of seizures. Lateralized RDA seems to be more strongly associated with the presence of seizure activity. Appropriate recognition of generalized RDA and lateralized rhythmic delta activity may be confounded by benign etiologies of RDA, such as phi rhythm, slow alpha variant, subclinical rhythmic electrographic discharges of adults, or hyperventilation-induced high-amplitude rhythmic slowing...
May 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29717414/primary-central-sleep-apnea-and-anesthesia-a-retrospective-case-series
#7
Alexandru Alexa, Meghna P Mansukhani, Bhargavi Gali, Atousa Deljou, Juraj Sprung, Toby N Weingarten
PURPOSE: Primary (idiopathic) central sleep apnea (PCSA) is a rare central sleep-related breathing disorder characterized by increased chemoreceptor sensitivity to partial pressure of carbon dioxide, which manifests as hyperventilation followed by apnea during non-rapid eye movement sleep. The purpose of this retrospective study was to describe the postoperative course of patients who had PCSA and underwent procedures requiring anesthetic management. METHODS: Patients who received a diagnosis of PCSA at our institution and required procedural anesthesia between 1 January 2010 and 1 June 2016 underwent a comprehensive review of their health records with a focus on identifying respiratory complications...
May 1, 2018: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/29702608/liver-injury-by-carbon-tetrachloride-intoxication-in-16-patients-treated-with-forced-ventilation-to-accelerate-toxin-removal-via-the-lungs-a-clinical-report
#8
REVIEW
Rolf Teschke
Carbon tetrachloride (CCl₄) is an efficient but highly toxic solvent, used in households and commercially in the industry under regulatory surveillance to ensure safety at the working place and to protect the workers’ health. However, acute unintentional or intentional intoxications by CCl₄ may rarely occur and are potentially life-threatening. In this review article, therapy options are discussed that are based on a literature review of traditional poisoning cases and the clinical experience with 16 patients with acute poisoning by CCl₄...
April 27, 2018: Toxics
https://www.readbyqxmd.com/read/29698766/effects-of-salinity-and-hypoxia-induced-hyperventilation-on-oxygen-consumption-and-cost-of-osmoregulation-in-the-estuarine-red-drum-sciaenops-ocellatus
#9
Rasmus Ern, Andrew J Esbaugh
Understanding the physiological responses of fishes to salinity changes and aquatic hypoxia is essential for the conservation of marine species. Salinity changes affect the osmotic gradient across the gill epithelium, while hypoxia increases gill ventilation and the flow of water over the gills. Both processes affect the diffusive movement of ions and water across the gill epithelium, and the rate of active ion transport required for maintaining osmotic homeostasis. Consequently, salinity and hypoxia may affect the energetic cost of osmoregulation, and consequently the energy available for other physiological functions such as migration, growth, and reproduction...
April 23, 2018: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/29695988/acute-anxiety-predicts-components-of-the-cold-shock-response-on-cold-water-immersion-toward-an-integrated-psychophysiological-model-of-acute-cold-water-survival
#10
Martin J Barwood, Jo Corbett, Heather Massey, Terry McMorris, Mike Tipton, Christopher R D Wagstaff
Introduction: Drowning is a leading cause of accidental death. In cold-water, sudden skin cooling triggers the life-threatening cold shock response (CSR). The CSR comprises tachycardia, peripheral vasoconstriction, hypertension, inspiratory gasp, and hyperventilation with the hyperventilatory component inducing hypocapnia and increasing risk of aspirating water to the lungs. Some CSR components can be reduced by habituation (i.e., reduced response to stimulus of same magnitude) induced by 3-5 short cold-water immersions (CWI)...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29690770/repeated-interoceptive-exposure-in-individuals-with-high-and-low-anxiety-sensitivity
#11
Katharina Holtz, Alfons O Hamm, Christiane A Pané-Farré
Interoceptive exposure is one component in cognitive behavioral therapy of panic disorder. The present investigation addressed changes in defensive mobilization during repeated interoceptive exposure using a standardized hyperventilation procedure. 26 high and 22 low anxiety sensitive persons (ASI, Peterson & Reiss, 1992) went through two guided hyperventilation and normoventilation procedures, spaced one week apart. Breathing parameters, startle response magnitudes and symptom reports were measured. All participants successfully adhered to the guided breathing procedures...
April 1, 2018: Behavior Modification
https://www.readbyqxmd.com/read/29685555/prevalence-of-benign-epileptiform-variants-during-initial-eeg-examination-in-french-military-aircrew
#12
Jonathan Monin, Estelle Pruvost-Robieux, Nicolas Huiban, Angela Marchi, Benoit Crepon, Dominique Dubourdieu, Eric Perrier, Martine Gavaret
INTRODUCTION: In France, a systematic EEG is performed during initial examination in military aircrew applicants, which may provide an estimation of the prevalence of benign epileptiform variants in healthy adults. METHODS: We analyzed standard EEG (21 scalp electrodes, 20minutes, 400Hz sampling rate) of military aircrew applicants examined in the French Main Aeromedical Center in 2016. EEGs were analyzed using both bipolar and referential montages. The collected data were EEG abnormalities and benign epileptiform variants...
April 20, 2018: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/29681326/critical-life-functions-can-placebo-replace-oxygen
#13
Fabrizio Benedetti, Diletta Barbiani, Eleonora Camerone
A crucial question in placebo research is related to which conditions and physiological functions are affected by placebos. Here we present evidence that critical life functions, like ventilation, oxygenation, circulation, and perfusion, can be sensitive to placebo treatments in some circumstances. Indeed, we have investigated the role of placebo effects at an altitude of 3500m, where oxygen pressure is 64% compared to the sea level. In these extreme conditions, hypoxia triggers several compensatory responses, such as hyperventilation, increased cardiac output, and increased brain perfusion...
2018: International Review of Neurobiology
https://www.readbyqxmd.com/read/29680728/respiratory-subtype-of-panic-disorder-can-serum-phosphate-levels-be-a-possible-outcome-to-group-cognitive-behavior-therapy
#14
Pedro Beria, Ana Cristina W Viana, Andressa Behenck, Elizeth Heldt, Gisele Gus Manfro, Carolina Blaya Dreher
OBJECTIVE: Panic disorder (PD) respiratory subtype (RS) was described in order to cluster patients according to their symptoms. These patients are characterized by experiencing a relatively high number of noticeable respiratory symptoms during a panic attack (PA) and a higher reactivity to CO2 . In this study, we aimed to evaluate the clinical relevance of this diagnostic category, evaluating if there are different responses to cognitive-behavioral therapy in patients with panic disorder RS as compared to those with the non-respiratory subtype (NRS), using serum phosphate as a biological marker...
April 12, 2018: Journal of Affective Disorders
https://www.readbyqxmd.com/read/29671866/isocapnic-hyperventilation-provides-early-extubation-after-head-and-neck-surgery-a-prospective-randomized-trial
#15
K Hallén, P Jildenstål, O Stenqvist, J Oras, S-E Ricksten, S Lindgren
BACKGROUND: Isocapnic hyperventilation (IHV) shortens recovery time after inhalation anaesthesia by increasing ventilation while maintaining a normal airway carbon dioxide (CO2 )-level. One way of performing IHV is to infuse CO2 to the inspiratory limb of a breathing circuit during mechanical hyperventilation (HV). In a prospective randomized study, we compared this IHV technique to a standard emergence procedure (control). METHODS: Thirty-one adult ASA I-III patients undergoing long-duration (>3 hours) sevoflurane anaesthesia for major head and neck surgery were included and randomized to IHV-treatment (n = 16) or control (n = 15)...
April 19, 2018: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/29670481/exercise-associated-muscle-cramp-doubts-about-the-cause
#16
Dzenan Jahic, Edin Begic
Introduction: Exercise-associated muscle cramp (EAMC) is one of the most common conditions that occur during or immediately after the exercise, with questionable etiology. Aim: Aim of article was to present doubts about the cause of EAMC, whether it is primarily a neurological condition or it is water and salt imbalance. Results: Strongest evidence supports the neuromuscular aetiology with the focus on the muscle fatigue. Muscle overload and fatigue affects the balance between the excitatory drive from muscle spindles and the inhibitory drive from the Golgi tendon organs (GTO)...
March 2018: Materia Socio-medica
https://www.readbyqxmd.com/read/29622334/pediatric-major-head-injury-not-a-minor-problem
#17
REVIEW
Aaron N Leetch, Bryan Wilson
Traumatic brain injury is a highly prevalent and devastating cause of morbidity and mortality in children. A rapid, stepwise approach to the traumatized child should proceed, addressing life-threatening problems first. Management focuses on preventing secondary injury from physiologic extremes such as hypoxemia, hypotension, prolonged hyperventilation, temperature extremes, and rapid changes in cerebral blood flow. Initial Glasgow Coma Score, hyperglycemia, and imaging are often prognostic of outcome. Surgically amenable lesions should be evacuated promptly...
May 2018: Emergency Medicine Clinics of North America
https://www.readbyqxmd.com/read/29621262/rescue-of-hyperexcitability-in-hippocampal-ca1-neurons-from-mecp2-y-mouse-through-surface-potential-neutralization
#18
Saju Balakrishnan, Sergej L Mironov
Hyperventilation is a known feature of Rett syndrome (RTT). However, how hyperventilation is related to other RTT symptoms such as hyperexcitability is unknown. Intense breathing during hyperventilation induces hypocapnia and culminates in respiratory alkalosis. Alkalinization of extracellular milieu can trigger epilepsy in patients who already have neuronal hyperexcitability. By combining patch-clamp electrophysiology and quantitative glutamate imaging, we compared excitability of CA1 neurons of WT and Mecp2 (-/y) mice, and analyzed the biophysical properties of subthreshold membrane channels...
2018: PloS One
https://www.readbyqxmd.com/read/29615073/advanced-airway-management-in-hoist-and-longline-operations-in-mountain-hems-considerations-in-austere-environments-a-narrative-review-this-review-is-endorsed-by-the-international-commission-for-mountain-emergency-medicine-icar-medcom
#19
REVIEW
Urs Pietsch, Jürgen Knapp, Oliver Kreuzer, Ludwig Ney, Giacomo Strapazzon, Volker Lischke, Roland Albrecht, Patrick Phillips, Simon Rauch
BACKGROUND: Providing sufficient oxygenation and ventilation is of paramount importance for the survival of emergency patients. Therefore, advanced airway management is one of the core tasks for every rescue team. Endotracheal intubation is the gold standard to secure the airway in the prehospital setting. This review aims to highlight special considerations for advanced airway management preceding human external cargo (HEC) evacuations. METHODS: We systematically searched MEDLINE, EMBASE, and PubMed in August 2017 for articles on airway management and ventilation in patients before hoist or longline operation in HEMS...
April 3, 2018: Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine
https://www.readbyqxmd.com/read/29605837/pathophysiology-of-noncardiac-syncope-in-athletes
#20
REVIEW
Georgios A Christou, Konstantinos A Christou, Dimitrios N Kiortsis
The most frequent cause of syncope in young athletes is noncardiac etiology. The mechanism of noncardiac syncope (NCS) in young athletes is neurally-mediated (reflex). NCS in athletes usually occurs either as orthostasis-induced, due to a gravity-mediated reduced venous return to the heart, or in the context of exercise. Exercise-related NCS typically occurs after the cessation of an exercise bout, while syncope occurring during exercise is highly indicative of the existence of a cardiac disorder. Postexercise NCS appears to result from hypotension due to impaired postexercise vasoconstriction, as well as from hypocapnia...
March 31, 2018: Sports Medicine
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