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ventilatory efficiency

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https://www.readbyqxmd.com/read/27861467/antenatal-dexamethasone-vs-betamethasone-dosing-for-lung-maturation-in-fetal-sheep
#1
Augusto F Schmidt, Matthew W Kemp, Paranthaman S Kannan, Boris W Kramer, John P Newnham, Suhas G Kallapur, Alan H Jobe
BackgroundDexamethasone-phosphate (Dex-PO4) and the combination betamethasone-phosphate (Beta-PO4) + betamethasone-acetate (Beta-Ac) are the most used antenatal corticosteroids to promote fetal lung maturation . We compared fetal lung maturation induced by Beta-Ac+Beta-PO4, Dex-PO4, or Beta-PO4 alone.MethodsPregnant ewes received 2 intramuscular doses 24h apart of 0.25mg/kg/dose of Beta-Ac+Beta-PO4, Dex-PO4 or Beta-PO4; or 2 doses of 0.125mg/kg/dose of Beta-PO4 at 6h, 12h, or 24h intervals. Fetuses were delivered 48h after the first dose and ventilated for 30min...
November 18, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27796267/exercise-capacity-following-a-percutaneous-endoscopic-gastrostomy-in-a-young-female-with-cystic-fibrosis-a-case-report
#2
Owen W Tomlinson, Alan R Barker, Patrick J Oades, Craig A Williams
Cystic fibrosis (CF) is a genetic condition affecting the respiratory and gastrointestinal systems, with patients experiencing problems maintaining weight, especially during rapid growth periods such as puberty. The aim of this case report was to monitor the effect of gastrostomy insertion and implementation of overnight supplemental feeding upon clinical outcomes, including body mass index (BMI), lung function (FEV1), and exercise-related variables (maximal oxygen uptake [VO2max] and ventilatory efficiency [VE/VO2]) in an 11-year-old female with CF Combined incremental and supramaximal exercise testing to exhaustion was performed at four time points: 3 months prior to the procedure (T1), 2 days prior to (T2), 4 months (T3), and 1 year following the procedure (T4)...
August 2016: Physiological Reports
https://www.readbyqxmd.com/read/27749511/early-noninvasive-neurally-adjusted-ventilatory-assist-versus-noninvasive-flow-triggered-pressure-support-ventilation-in-pediatric-acute-respiratory-failure-a-physiologic-randomized-controlled-trial
#3
Giovanna Chidini, Daniele De Luca, Giorgio Conti, Paolo Pelosi, Stefano Nava, Edoardo Calderini
OBJECTIVE: Neurally adjusted ventilatory assist has been shown to improve patient-ventilator interaction in children with acute respiratory failure. Objective of this study was to compare the effect of noninvasive neurally adjusted ventilatory assist versus noninvasive flow-triggered pressure support on patient-ventilator interaction in children with acute respiratory failure, when delivered as a first-line respiratory support. DESIGN: Prospective randomized crossover physiologic study...
November 2016: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/27736721/functional-parameters-but-not-heart-rate-variability-correlate-with-long-term-outcomes-in-st-elevation-myocardial-infarction-patients-treated-by-primary-angioplasty
#4
Leonida Compostella, Nenad Lakusic, Nicola Russo, Tiziana Setzu, Caterina Compostella, Elia Vettore, Giambattista Isabella, Giuseppe Tarantini, Sabino Iliceto, Fabio Bellotto
BACKGROUND: Depressed heart rate variability (HRV) is usually considered a negative long-term prognostic factor after acute myocardial infarction. Anyway, most of the supporting research was conducted before the era of immediate reperfusion by percutaneous coronary intervention (PCI). Main aim of this study was to evaluate if HRV still retains prognostic significance in our era of immediate PCI. METHODS AND RESULTS: Two weeks after STEMI treated by primary PCI, time-domain HRV was assessed from 24-h Holter recordings in 186 patients: markedly depressed HRV (SDNN <70ms or <50ms) was present in 16% and in 5% of cases, respectively; patients with left ventricle ejection fraction (LVEF) <40% presented more often SDNN values in the lowest quartile...
December 1, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27722910/niv-by-an-interdisciplinary-respiratory-care-team-in-severe-respiratory-failure-in-the-emergency-department-limited-to-day-time-hours
#5
Christian Michael Horvath, Martin Horvath Brutsche, Otto Dagobert Schoch, Bernarde Schillig, Florent Baty, Dieter vonOw, Jochen Julius Rüdiger
Non-invasive ventilatory support is frequently used in patients with severe respiratory failure (SRF), but is often limited to intensive care units (ICU). We hypothesized that an instantaneous short course of NIV (up to 2 h), limited to regular working hours as an additional therapy on the emergency department (ED) would be feasible and could improve patient´s dyspnoea measured by respiratory rate and Borg visual dyspnea scale. NIV was set up by an interdisciplinary respiratory care team. Outside these predefined hours NIV was performed in the ICU...
October 8, 2016: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/27701063/physiological-and-sensory-consequences-of-exercise-oscillatory-ventilation-in-heart-failure-copd
#6
Alcides Rocha, Flavio F Arbex, Maria Clara N Alencar, Priscila A Sperandio, Daniel M Hirai, Danilo C Berton, Denis E O'Donnell, J Alberto Neder
BACKGROUND: Exercise oscillatory ventilation (EOV) is associated with poor ventilatory efficiency and higher operating lung volumes in heart failure. These abnormalities may be particularly deleterious to dyspnea and exercise tolerance in mechanically-limited patients, e.g. those with coexistent COPD. METHODS: Ventilatory, gas exchange and sensory responses to incremental exercise were contrasted in 68 heart failure-COPD patients (12 EOV+). EOV was established by standard criteria...
September 24, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/27692931/heart-failure-and-anemia-effects-on-prognostic-variables
#7
Gaia Cattadori, Piergiuseppe Agostoni, Ugo Corrà, Gianfranco Sinagra, Fabrizio Veglia, Elisabetta Salvioni, Alice Bonomi, Rocco La Gioia, Angela B Scardovi, Alessandro Ferraironi, Michele Emdin, Marco Metra, Andrea Di Lenarda, Giuseppe Limongelli, Rosa Raimondo, Federica Re, Marco Guazzi, Romualdo Belardinelli, Gianfranco Parati, Sergio Caravita, Damiano Magrì, Carlo Lombardi, Maria Frigerio, Fabrizio Oliva, Davide Girola, Alessandro Mezzani, Stefania Farina, Massimo Mapelli, Domenico Scrutinio, Giuseppe Pacileo, Anna Apostolo, AnnaMaria Iorio, Stefania Paolillo, Pasquale Perrone Filardi, Paola Gargiulo, Maurizio Bussotti, Giovanni Marchese, Michele Correale, Roberto Badagliacca, Susanna Sciomer, Pietro Palermo, Mauro Contini, Pantaleo Giannuzzi, Elisa Battaia, Mariantonietta Cicoira, Francesco Clemenza, Chiara Minà, Simone Binno, Claudio Passino, Massimo F Piepoli
BACKGROUND: Anemia is frequent in heart failure (HF), and it is associated with higher mortality. The predictive power of established HF prognostic parameters in anemic HF patients is unknown. METHODS: Clinical, laboratory, echocardiographic and cardiopulmonary-exercise-test (CPET) data were analyzed in 3913 HF patients grouped according to hemoglobin (Hb) values. 248 (6%), 857 (22%), 2160 (55%) and 648 (17%) patients had very low (<11g/dL), low (11-12 for females, 11-13 for males), normal (12-15 for females, 13-15 for males) and high (>15) Hb, respectively...
September 28, 2016: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/27669996/-how-to-characterize-and-treat-sleep-complaints-in-bipolar-disorders
#8
P A Geoffroy, J-A Micoulaud Franchi, R Lopez, I Poirot, A Brion, S Royant-Parola, B Etain
OBJECTIVES: Sleep complaints are very common in bipolar disorders (BD) both during acute phases (manic and depressive episodes) and remission (about 80 % of patients with remitted BD have poor sleep quality). Sleep complaints during remission are of particular importance since they are associated with more mood relapses and worse outcomes. In this context, this review discusses the characterization and treatment of sleep complaints in BD. METHODS: We examined the international scientific literature in June 2016 and performed a literature search with PubMed electronic database using the following headings: "bipolar disorder" and ("sleep" or "insomnia" or "hypersomnia" or "circadian" or "apnoea" or "apnea" or "restless legs")...
September 23, 2016: L'Encéphale
https://www.readbyqxmd.com/read/27628102/heart-failure-progression-in-hypertrophic-cardiomyopathy%C3%A3-possible-insights-from-cardiopulmonary-exercise-testing
#9
Damiano Magrì, Federica Re, Giuseppe Limongelli, Piergiuseppe Agostoni, Elisabetta Zachara, Michele Correale, Vittoria Mastromarino, Caterina Santolamazza, Matteo Casenghi, Giuseppe Pacileo, Fabio Valente, Marco Morosin, Beatrice Musumeci, Erika Pagannone, Antonello Maruotti, Massimo Uguccioni, Massimo Volpe, Camillo Autore
BACKGROUND: Heart failure (HF) progression and its complications represent major emergent concerns in hypertrophic cardiomyopathy (HCM). We investigated the possible adjunctive role of cardiopulmonary exercise testing (CPET) in predicting HF-related events. An exercise-derived risk model, theHYPertrophicExercise-derivedRiskHF(HYPERHF), has been developed. METHODS AND RESULTS: A multicenter cohort of 620 consecutive HCM outpatients was recruited and followed (2007 to 2015)...
September 23, 2016: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/27613475/feasibility-of-monomodal-analgesia-with-iv-alfentanil-during-burn-dressing-changes-at-bedside-in-spontaneously-breathing-non-intubated-patients
#10
Mathieu Fontaine, Jacques Latarjet, Jacqueline Payre, Jean-Charles Poupelin, François Ravat
INTRODUCTION: The severe pain related to repeated burn dressing changes at bedside is often difficult to manage. However these dressings can be performed at bedside on spontaneously breathing non-intubated patients using powerful intravenous opioids with a quick onset and a short duration of action such as alfentanil. The purpose of this study is to demonstrate the efficacy and safety of the protocol which is used in our burn unit for pain control during burn dressing changes. PATIENTS AND METHODS: Cohort study began after favorable opinion from local ethic committee has been collected...
September 6, 2016: Burns: Journal of the International Society for Burn Injuries
https://www.readbyqxmd.com/read/27568783/ventilatory-efficiency-slope-as-a-predictor-of-suitability-for-surgery-in-chronic-obstructive-pulmonary-disease-patients-with-lung-cancer
#11
Mathew Suji Eapen, Ravneet Grover, Kiran Ahuja, Andrew Williams, Sukhwinder Singh Sohal
No abstract text is available yet for this article.
August 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27496629/resting-end-tidal-carbon-dioxide-predicts-respiratory-complications-in-patients-undergoing%C3%A2-thoracic-surgical-procedures
#12
Kristian Brat, Zuzana Tothova, Zdenek Merta, Alice Taskova, Pavel Homolka, Martina Vasakova, Jana Skrickova, Vladimir Sramek, Lyle J Olson, Ivan Cundrle
BACKGROUND: Ventilatory efficiency (V˙e/V˙co2 slope [minute ventilation to carbon dioxide output slope]) has been shown to predict morbidity and mortality in lung resection candidates. Patients with increased V˙e/V˙co2 during exercise also exhibit an increased V˙e/V˙co2 ratio and a decreased end-tidal CO2 at rest. This study hypothesized that ventilatory values at rest predict respiratory complications and death in patients undergoing thoracic surgical procedures. METHODS: Inclusion criteria for this retrospective, multicenter study were thoracotomy and cardiopulmonary exercise testing as part of routine preoperative assessment...
August 2, 2016: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/27454553/ventilatory-threshold-may-be-a-more-specific-measure-of-aerobic-capacity-than-peak-oxygen-consumption-rate-in-persons-with-stroke
#13
Pierce Boyne, Darcy Reisman, Michael Brian, Brian Barney, Ava Franke, Daniel Carl, Jane Khoury, Kari Dunning
BACKGROUND: After stroke, aerobic deconditioning can have a profound impact on daily activities. This is usually measured by the peak oxygen consumption rate achieved during exercise testing (VO2-peak). However, VO2-peak may be distorted by motor function. The oxygen uptake efficiency slope (OUES) and VO2 at the ventilatory threshold (VO2-VT) could more specifically assess aerobic capacity after stroke, but this has not been tested. OBJECTIVES: To assess the differential influence of motor function on three measures of aerobic capacity (VO2-peak, OUES, and VO2-VT) and to evaluate the inter-rater reliability of VO2-VT determination post-stroke...
July 25, 2016: Topics in Stroke Rehabilitation
https://www.readbyqxmd.com/read/27454134/aerobic-fitness-and-technical-efficiency-at-high-intensity-discriminate-between-elite-and-subelite-tennis-players
#14
E Baiget, X Iglesias, F A Rodríguez
The aim of this study was to determine whether selected physiological, performance and technical parameters derived from an on-court test are capable of discriminating between tennis players of national and international levels. 38 elite and subelite tennis players were divided into international level (INT, n=8) and national level players (NAT, n=30). They all performed a specific endurance field test, and selected physiological (maximum oxygen uptake [V˙O2max], and ventilatory thresholds [VT1 and VT2]), performance (test duration, final stage and hits per test) and technical (technical effectiveness [TE]) parameters were compared...
October 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27442715/the-effect-of-donepezil-on-arousal-threshold-and-apnea-hypopnea-index-a-randomized-double-blind-cross-over-study
#15
Yanru Li, Robert L Owens, Scott Sands, Jeremy Orr, Walter Moraes, Pamela DeYoung, Erik Smales, Rachel Jen, Atul Malhotra
RATIONALE: Obstructive sleep apnea (OSA) has multiple pathophysiological causes. A low respiratory arousal threshold (ArTh) and a high loop gain (unstable ventilatory control) can contribute to recurrent respiratory events in patients with OSA. Prior small studies have shown that donepezil, an acetylcholinesterase inhibitor, might improve OSA, but the mechanism is unknown. OBJECTIVES: To determine whether a single dose of donepezil lowers the apnea hypopnea index (AHI) by modulating the ArTh or loop gain...
July 21, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27415618/changes-in-hepatic-venous-pressure-gradient-induced-by-physical-exercise-in-cirrhosis-results-of-a-pilot-randomized-open-clinical-trial
#16
Ricardo U Macías-Rodríguez, Hermes Ilarraza-Lomelí, Astrid Ruiz-Margáin, Sergio Ponce-de-León-Rosales, Florencia Vargas-Vorácková, Octavio García-Flores, Aldo Torre, Andrés Duarte-Rojo
OBJECTIVES: Exercise has been scarcely studied in patients with cirrhosis, and prior evidence showed hepatic venous pressure gradient (HVPG) to be increased in response to exercise. The aim of this study was to investigate the effects of a supervised physical exercise program (PEP) in patients with cirrhosis. METHODS: In an open-label, pilot clinical trial, patients with cirrhosis were randomized to PEP (cycloergometry/kinesiotherapy plus nutritional therapy, n=14) or control (nutritional therapy, n=15); for 14 weeks...
2016: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/27372842/hemodynamic-and-ventilatory-responses-during-exercise-in-chronic-thromboembolic-disease
#17
Coen van Kan, Mart N van der Plas, Herre J Reesink, Reindert P van Steenwijk, Jaap J Kloek, Robert Tepaske, Peter I Bonta, Paul Bresser
BACKGROUND: Patients with chronic thromboembolic disease (CTED) may suffer from exercise intolerance without pulmonary hypertension at rest. Pulmonary endarterectomy (PEA) for symptomatic CTED results in improvement of symptoms and quality of life. Neither the pathophysiology of the exercise limitation nor the underlying mechanisms of the PEA-induced improvement have been studied previously. OBJECTIVES: We studied hemodynamic and ventilatory responses upon exercise in 14 patients with CTED...
September 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27332771/effect-of-exercise-training-on-ventilatory-efficiency-in-patients-with-heart-disease-a-review
#18
D M L Prado, E A Rocco, A G Silva, D F Rocco, M T Pacheco, V Furlan
The analysis of ventilatory efficiency in cardiopulmonary exercise testing has proven useful for assessing the presence and severity of cardiorespiratory diseases. During exercise, efficient pulmonary gas exchange is characterized by uniform matching of lung ventilation with perfusion. By contrast, mismatching is marked by inefficient pulmonary gas exchange, requiring increased ventilation for a given CO2 production. The etiology of increased and inefficient ventilatory response to exercise in heart disease is multifactorial, involving both peripheral and central mechanisms...
June 20, 2016: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/27325674/the-zinc-finger-of-prolyl-hydroxylase-domain-protein-2-is-essential-for-efficient-hydroxylation-of-hypoxia-inducible-factor-%C3%AE
#19
Patrick R Arsenault, Daisheng Song, Yu Jin Chung, Tejvir S Khurana, Frank S Lee
Prolyl hydroxylase domain protein 2 (PHD2) (also known as EGLN1) is a key oxygen sensor in mammals that posttranslationally modifies hypoxia-inducible factor α (HIF-α) and targets it for degradation. In addition to its catalytic domain, PHD2 contains an evolutionarily conserved zinc finger domain, which we have previously proposed recruits PHD2 to the HSP90 pathway to promote HIF-α hydroxylation. Here, we provide evidence that this recruitment is critical both in vitro and in vivo We show that in vitro, the zinc finger can function as an autonomous recruitment domain to facilitate interaction with HIF-α...
September 15, 2016: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27297666/progression-from-respiratory-dysfunction-to-failure-in-late-onset-pompe-disease
#20
Kenneth I Berger, Yinny Chan, William N Rom, Beno W Oppenheimer, Roberta M Goldring
To identify determinants of respiratory disease progression in late-onset Pompe disease (LOPD), we studied relationships between pulmonary function, respiratory muscle strength, gas exchange, and respiratory control. Longitudinal evaluation of 22 LOPD patients (mean age 38 years) was performed at 6-month intervals for 6-24 months. Measurements included vital capacity (VC), maximum inspiratory pressure (MIP), maximum expiratory pressure (MEP), tidal volume (VT), dead space (VD), and ventilatory response to CO2...
August 2016: Neuromuscular Disorders: NMD
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