keyword
MENU ▼
Read by QxMD icon Read
search

vo2

keyword
https://www.readbyqxmd.com/read/29777847/cardiopulmonary-exercise-testing-limitation-in-peripheral-arterial-disease
#1
Zulfiqar Qutrio Baloch, Shabber Agha Abbas, Luke Marone, Abbas Ali
OBJECTIVE: PAD is associated with a markedly increased risk of cardiovascular mortality and remains under-recognized and under-treated. New screening approaches are needed to prevent disability in patients with PAD. METHODS: We performed a retrospective analysis of clinically stable cardiovascular patients who were referred for cardiopulmonary exercise testing (CPET) due to a variety of cardiovascular complaints. Amongst patients who prematurely terminated CPET, their available angiograms were assessed...
May 16, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29776810/congenital-heart-disease-in-adults-assessmentof-functional-capacity-using-cardiopulmonary-exercise-testing
#2
Sílvia Aguiar Rosa, Ana Agapito, Rui M Soares, Lídia Sousa, José Alberto Oliveira, Ana Abreu, Ana Sofia Silva, Sandra Alves, Helena Aidos, Fátima F Pinto, Rui Cruz Ferreira
AIM: The aim of the study was to compare functional capacity in different types of congenital heart disease (CHD), as assessed by cardiopulmonary exercise testing (CPET). METHODS: A retrospective analysis was performed of adult patients with CHD who had undergone CPET in a single tertiary center. Diagnoses were divided into repaired tetralogy of Fallot, transposition of the great arteries (TGA) after Senning or Mustard procedures or congenitally corrected TGA, complex defects, shunts, left heart valve disease and right ventricular outflow tract obstruction...
May 15, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29770745/2706-km-cycling-in-two-weeks-effects-on-cardiac-function-in-six-elderly-male-athletes
#3
Thomas Morville, Mads Rosenkilde, Nick Mattsson, Flemming Dela, Jørn W Helge, Hanne K Rasmusen
INTRODUCTION: Physiological effects of exercise on trained and untrained individuals have been studied extensively. Typically, young or middle-aged individuals are examined before and after short periods of vigorous exertion. METHODS: We studied six elderly male athletes (61±8 years (mean ± SD); baseline VO2 max 48±5 ml·kg-1 · min-1 ) with focus on cardiac function and biomarkers following 14 consecutive days of moderate intensity exercise. Cardiac dimensions, function, biomarkers, and other measures of cardiovascular health were examined at baseline and 2 and 28 h after the last day of cycling a total of 2706 km...
May 17, 2018: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/29769619/passive-temperature-control-based-on-a-phase-change-metasurface
#4
Sheng-Rui Wu, Kuan-Lin Lai, Chih-Ming Wang
In this paper, a tunable mid-infrared metasurface based on VO2 phase change material is proposed for temperature control. The proposed structure consisting of a VO2 /SiO2 /VO2 cavity supports a thermally switchable Fabry-Perot-like resonance mode at the transparency window of the atmosphere. Theoretically, the radiative cooling power density of the proposed metasurface can be switched to four-fold as the device temperature is below/above the phase change temperature of VO2 . Besides radiative cooling, a passive temperature control application based on this huge cooling power switching ability is theoretically demonstrated...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29767985/imaging-nanometer-phase-coexistence-at-defects-during-the-insulator-metal-phase-transformation-in-vo-2-thin-films-by-resonant-soft-x-ray-holography
#5
Luciana Vidas, Christian Guenther, Timothy Miller, Bastian Pfau, Daniel Perez, Elias Martinez, Michael Schneider, Erik Guehrs, Robert E Marvel, Kent Hallman, Richard F Haglund, Stefan Eisebitt, Simon Wall
We use resonant soft X-ray holography to image the insulator-metal phase transition in vanadium dioxide with element and polarization specificity and nanometer spatial resolution. We observe that nanoscale inhomogenity in the film results in spatial-dependent transition pathways between the insulating and metallic states. Additional nanoscale phases form in the vicinity of defects which are not apparent in the initial or final states of the system, which would be missed in area-integrated X-ray absorption measurements...
May 16, 2018: Nano Letters
https://www.readbyqxmd.com/read/29766190/toxicity-assessment-and-mechanistic-investigation-of-engineered-monoclinic-vo-2-nanoparticles
#6
Di Wu, Qianqian Su, Yang Li, Chen Zhang, Xian Qin, Yuan-Yuan Liu, Wen-Song Xi, Yanfeng Gao, Aoneng Cao, Xiaogang Liu, Haifang Wang
Growing interest in monoclinic VO2 nanoparticles (NPs) among consumers and the industries of window coatings, solar sensors etc. has brought particular attention to their safety concerns. The toxicity of this new class of nanomaterials in bacterial ecosystems has not yet been evaluated. The degree of crystallinity is a significant parameter that determines the performance of materials. However, the previously reported methods for toxicity assessment have neglected its influence. In this work, we systematically evaluated the toxicity of VO2 NPs with different degrees of crystallinity to four typical bacterial strains and studied the influence of physicochemical properties and aging treatment on their antibacterial effect...
May 16, 2018: Nanoscale
https://www.readbyqxmd.com/read/29764969/cardiovascular-phenotype-and-prognosis-of-patients-with-heart-failure-induced-by-cancer-therapy
#7
Wilson Nadruz, Erin West, Morten Sengeløv, Gabriela L Grove, Mário Santos, John D Groarke, Daniel E Forman, Brian Claggett, Hicham Skali, Anju Nohria, Amil M Shah
OBJECTIVE: This study compared the clinical features, cardiac structure and function evaluated by echocardiography, cardiopulmonary response to exercise and long-term clinical outcomes between patients with heart failure (HF) induced by cancer therapy (CTHF) and heart failure not induced by cancer therapy (NCTHF). METHODS: We evaluated 75 patients with CTHF and 894 with NCTHF who underwent clinically indicated cardiopulmonary exercise testing, and followed these individuals for a median of 4...
May 15, 2018: Heart: Official Journal of the British Cardiac Society
https://www.readbyqxmd.com/read/29761561/ultrafast-zn-2-intercalation-and-deintercalation-in-vanadium-dioxide
#8
Junwei Ding, Zhiguo Du, Linqing Gu, Bin Li, Lizhen Wang, Shiwen Wang, Yongji Gong, Shubin Yang
Although rechargeable aqueous zinc-ion batteries have attracted extensive interest due to their environmental friendliness and low cost, they still lack suitable cathodes with high rate capabilities, which are hampered by the intense charge repulsion of bivalent Zn2+ . Here, a novel intercalation pseudocapacitance behavior and ultrafast kinetics of Zn2+ into the unique tunnels of VO2 (B) nanofibers in aqueous electrolyte are demonstrated via in situ X-ray diffraction and various electrochemical measurements...
May 15, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29761310/characteristics-of-patients-with-a-relatively-greater-minimum-ve-vco-2-against-peak-vo-2-and-impaired-exercise-tolerance
#9
Taisuke Nakade, Hitoshi Adachi, Makoto Murata, Shigeru Oshima
PURPOSE: Cardiopulmonary exercise testing (CPX) is used to evaluate functional capacity and assess prognosis in cardiac patients. Ventilatory efficiency (VE/VCO2 ) reflects ventilation-perfusion mismatch; the minimum VE/VCO2 value (minVE/VCO2 ) is representative of pulmonary arterial blood flow in individuals without pulmonary disease. Usually, minVE/VCO2 has a strong relationship with the peak oxygen uptake (VO2 ), but dissociation can occur. Therefore, we investigated the relationship between minVE/VCO2 and predicted peak VO2 (peak VO2 %) and evaluated the parameters associated with a discrepancy between these two parameters...
May 14, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29760603/relationship-between-aerobic-capacity-with-oxidative-stress-and-inflammation-biomarkers-in-the-blood-of-older-mexican-urban-dwelling-population
#10
Juana Rosado-Pérez, Víctor Manuel Mendoza-Núñez
The maximal oxygen uptake (VO2max) constitutes an indicator of an organism's capacity to integrate oxygen into the metabolism to obtaining energy. The aim of this study was to determine the relationship between VO2max and oxidative stress (OxS) and chronic inflammation in the elderly individuals. A cross-sectional and exploratory study was conducted in a sample of 52 older persons. We measured plasma lipid peroxides (LPO), red blood cell glutathione peroxidase, red blood cell superoxide dismutase, and total antioxidant status...
April 2018: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/29758437/flexible-3d-fe-vo-2-core-shell-mesh-a-highly-efficient-and-easy-recycling-catalyst-for-the-removal-of-organic-dyes
#11
Jing Li, Ruoqi Wang, Zhen Su, Dandan Zhang, Heping Li, Youwei Yan
Nowadays, it is extremely urgent to search for efficient and effective catalysts for water purification due to the severe worldwide water-contamination crises. Here, 3D Fe@VO2 core-shell mesh, a highly efficient catalyst toward removal of organic dyes with excellent recycling ability in the dark is designed and developed for the first time. This novel core-shell structure is actually 304 stainless steel mesh coated by VO2 , fabricated by an electrophoretic deposition method. In such a core-shell structure, Fe as the core allows much easier separation from the water, endowing the catalyst with a flexible property for easy recycling, while VO2 as the shell is highly efficient in degradation of organic dyes with the addition of H2 O2 ...
May 11, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29757824/improvements-in-key-cardiopulmonary-exercise-testing-variables-following-cardiac-rehabilitation-in-patients-with-coronary-artery-disease
#12
Dejana Popovic, Nikhil Kumar, Sundeep Chaudhry, Akshay Bagai, Ross Arena, Naresh Kumar
PURPOSE: Improvements in cardiorespiratory fitness (VO2peak) post-cardiac rehabilitation (post-CR) are used to gauge therapeutic efficacy. The aim of the present study was to assess the effect of supervised CR on other cardiopulmonary exercise testing (CPX) variables, specifically those that reflect ventilatory efficiency and VO2 changes in relation to changes in work rate (WR). METHODS: Patients (n = 142; mean age 63 ± 9 y; 23% female) with coronary artery disease (CAD) participated in supervised CR for 3 to 6 mo completing 60 ± 17 sessions (range: 32-96 sessions), with intensity derived from the baseline CPX...
May 11, 2018: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/29756963/cardiorespiratory-fitness-and-fat-oxidation-during-exercise-as-protective-factors-for-insulin-resistance-in-sedentary-women-with-overweight-or-obesity
#13
Javiera Cancino Ramírez, Johana Soto Sánchez, Hermann Zbinden Foncea, Manuel Moreno González, Barbara Leyton Dinamarca, Luis González Rojas
INTRODUCTION: obesity is a global pandemic and it is the biggest risk factor for death worldwide nowadays. Studies suggest that both cardiorespiratory fitness and fat oxidation in exercise are related to insulin resistance and type 2 diabetes mellitus, and they could be used as metabolic fitness markers. OBJECTIVES: the aim of this study is to determine if cardiorespiratory fitness (VO2) and fat oxidation during exercise are protective factors of insulin resistance (IR) in sedentary women with obesity or overweight...
March 1, 2018: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29754812/a-randomized-controlled-trial-to-evaluate-the-safety-and-efficacy-of-cardiac-contractility-modulation
#14
William T Abraham, Karl-Heinz Kuck, Rochelle L Goldsmith, JoAnn Lindenfeld, Vivek Y Reddy, Peter E Carson, Douglas L Mann, Benjamin Saville, Helen Parise, Rodrigo Chan, Phi Wiegn, Jeffrey L Hastings, Andrew J Kaplan, Frank Edelmann, Lars Luthje, Rami Kahwash, Gery F Tomassoni, David D Gutterman, Angela Stagg, Daniel Burkhoff, Gerd Hasenfuß
OBJECTIVES: The authors sought to confirm a subgroup analysis of the prior FIX-HF-5 (Evaluate Safety and Efficacy of the OPTIMIZER System in Subjects With Moderate-to-Severe Heart Failure) study showing that cardiac contractility modulation (CCM) improved exercise tolerance (ET) and quality of life in patients with ejection fractions between 25% and 45%. BACKGROUND: CCM therapy for New York Heart Association (NYHA) functional class III and IV heart failure (HF) patients consists of nonexcitatory electrical signals delivered to the heart during the absolute refractory period...
May 5, 2018: JACC. Heart Failure
https://www.readbyqxmd.com/read/29754673/prevalent-digoxin-use-and-subsequent-risk-of-death-or-hospitalization-in-ambulatory-heart-failure-patients-with-a-reduced-ejection-fraction-findings-from-the-heart-failure-a-controlled-trial-investigating-outcomes-of-exercise-training-hf-action-randomized-controlled
#15
Andrew P Ambrosy, Ankeet S Bhatt, Amanda L Stebbins, Lisa M Wruck, Marat Fudim, Stephen J Greene, William E Kraus, Christopher M O'Connor, Ileana L Piña, David J Whellan, Robert J Mentz
BACKGROUND: Despite more than 200 years of clinical experience and a pivotal trial, recently published research has called into question the safety and efficacy of digoxin therapy in heart failure (HF). METHODS: HF-ACTION (ClinicalTrials.gov Number: NCT00047437) enrolled 2331 outpatients with HF and an EF ≤35% between April 2003 and February 2007 and randomized them to aerobic exercise training versus usual care. Patients were grouped according to prevalent digoxin status at baseline...
May 2018: American Heart Journal
https://www.readbyqxmd.com/read/29754647/effects-of-a-12-week-mhealth-program-on-peak-vo-2-and-physical-activity-patterns-after-completing-cardiac-rehabilitation-a-randomized-controlled-trial
#16
Brian D Duscha, Lucy W Piner, Mahesh P Patel, Karen P Craig, Morgan Brady, Robert W McGarrah, Connie Chen, William E Kraus
BACKGROUND: Site-based cardiac rehabilitation (CR) provides supervised exercise, education and motivation for patients. Graduates of CR have improved exercise tolerance. However, when participation in CR ceases, adherence to regular physical activity often declines, consequently leading to worsening risk factors and clinical events. Therefore, the purpose of this pilot study was to evaluate if a mHealth program could sustain the fitness and physical activity levels gained during CR. METHODS AND RESULTS: A 12-week mHealth program was implemented using physical activity trackers and health coaching...
May 2018: American Heart Journal
https://www.readbyqxmd.com/read/29749670/influence-of-water-depth-on-energy-expenditure-during-aquatic-walking-in-people-post-stroke
#17
Hyosok Lim, Daniel Azurdia, Brenda Jeng, Taeyou Jung
BACKGROUND AND PURPOSE: This study aimed to investigate the metabolic cost during aquatic walking at various depths in people post stroke. The secondary purpose was to examine the differences in metabolic cost between aquatic walking and land walking among individuals post stroke. DESIGN: A cross-sectional research design is used. METHODS: Twelve participants post stroke (aged 55.5 ± 13.3 years) completed 6 min of walking in 4 different conditions: chest-depth, waist-depth, and thigh-depth water, and land...
May 11, 2018: Physiotherapy Research International: the Journal for Researchers and Clinicians in Physical Therapy
https://www.readbyqxmd.com/read/29748195/does-high-intensity-endurance-training-increase-the-risk-of-atrial-fibrillation-a-longitudinal-study-of-left-atrial-structure-and-function
#18
Mildred A Opondo, Norman Aiad, Matthew A Cain, Satyam Sarma, Erin Howden, Douglas A Stoller, Jason Ng, Pieter van Rijckevorsel, Michinari Hieda, Takashi Tarumi, M Dean Palmer, Benjamin D Levine
BACKGROUND: Exercise mitigates many cardiovascular risk factors associated with atrial fibrillation. Endurance training has been associated with atrial structural changes which can increase the risk for atrial fibrillation. The dose of exercise training required for these changes is uncertain. We sought to evaluate the impact of exercise on left atrial (LA) mechanical and electrical function in healthy, sedentary, middle-aged adults. METHODS: Sixty-one adults (52±5 years) were randomized to either 10 months of high-intensity exercise training or yoga...
May 2018: Circulation. Arrhythmia and Electrophysiology
https://www.readbyqxmd.com/read/29747957/home-exercise-childhood-obesity-intervention-a-randomized-clinical-trial-comparing-print-versus-web-based-move-it-platforms
#19
Alejandro Bruñó, Patricia Escobar, Ausias Cebolla, Julio Álvarez-Pitti, Jaime Guixeres, Empar Lurbe, Rosa Baños, Juan F Lisón
PURPOSE: To compare the impact of adhering to a Mediterranean diet plus mixed physical exercise program (Move-It) implemented by means of printed instructions or via a web-platform (with or without e-mail support) on body composition, physical fitness, and blood pressure. DESIGN AND METHODS: Randomized clinical trial. Fifty-two overweight or obese Spanish children and adolescents were randomly assigned to the print-based (n = 18), Move-It (n = 18), or Move-It plus support (n = 16) intervention groups...
May 7, 2018: Journal of Pediatric Nursing
https://www.readbyqxmd.com/read/29745794/visceral-adipose-tissue-tracks-more-closely-with-metabolic-dysfunction-than-intrahepatic-triglyceride-in-non-diabetic-lean-asians
#20
Cherlyn Ding, Zhiling Chan, Yu Chung Chooi, John Choo, Suresh Anand Sadananthan, Navin Michael, S Sendhil Velan, Melvin Khee-Shing Leow, Faidon Magkos
BACKGROUND: Increased visceral adipose tissue (VAT) and intrahepatic triglyceride (IHTG) are important risk factors for the development of type 2 diabetes in obese subjects. The relative contribution of these ectopic fat depots to cardiometabolic risk differs between populations, depends on the degree of obesity and the level of cardiorespiratory fitness, and is difficult to dissect because VAT and IHTG typically co-vary. The aim of this study was to evaluate the effect of an isolated increase in VAT or IHTG on insulin sensitivity and insulin secretion in apparently healthy normal-weight Asian subjects...
May 10, 2018: Journal of Applied Physiology
keyword
keyword
12080
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"