OBJECTIVE To assess possible alterations in the tidal volume and peak inspiratory pressure delivered by seven models of manually operated self-inflating resuscitation bags as a function of the oxygen supply rate used. METHODS The resuscitation bags tested were the following: Oxigel, models A and B; CE Reanimadores; ProtecSolutions; Missouri; Axmed; and Narcosul. For the measurements, a wall o...

AIMS Kinetics of recovery oxygen consumption after exercise plays an important role in determining exercise capacity. This study was performed to assess the kinetics of recovery oxygen consumption in mitral stenosis and evaluate the effects of percutaneous balloon mitral valvuloplasty and exercise training on the kinetics. METHODS AND RESULTS Thirty patients with mitral stenosis (valve area <...

UNLABELLED Therapies currently implemented for obesity are focused on nutritional aspects and on physical activity. In order to make physical activity a positive therapy instead of triggering disabilities it is relevant to accurately assess cardiovascular fitness. OBJECTIVE To assess the cardiovascular fitness by measuring the peak oxygen consumption and to asses their relationship with class...

We tested the hypothesis that kinetics of O(2) uptake (VO(2)) measured in the transition to exercise near or above peak VO(2) (VO(2 peak)) would be slower than those for subventilatory threshold exercise. Eight healthy young men exercised at approximately 57, approximately 96, and approximately 125% VO(2 peak). Data were fit by a two- or three-component exponential model and with a semilogarith...

OBJECTIVE To investigate whether oxygen uptake (VO2) kinetics during low intensity exercise are related to clinical signs, symptoms, and neurohumoral activation independently of peak oxygen consumption in chronic heart failure. DESIGN Comparison of VO2 kinetics with peak VO2, neurohormones, and clinical signs of chronic heart failure. SETTING Tertiary care centre. PATIENTS 48 patients wit...

[Purpose] The purpose of this study was to explain the difference in characteristics of exercise limitation factors of patients with chronic obstructive pulmonary disease (COPD) and sequelea of pulmonary tuberculosis (PTB-s) . [Subjects] The subjects were 29 patients with COPD (28 males, 1 female; 70.6 ± 8.0 years) and 8 patients with PTB-s (5 males, 3 females; 69.5 ± 9.5 years). [Method] We co...

BACKGROUND Coenzyme Q10 is commonly used to treat congestive heart failure on the basis of data from several unblinded, subjective studies. Few randomized, blinded, controlled studies have evaluated objective measures of cardiac performance. OBJECTIVE To determine the effect of coenzyme Q10 on peak oxygen consumption, exercise duration, and ejection fraction. DESIGN Randomized, double-blind...

the present study is concerned with measuring and simulating soot formation and combustion in turbulent liquid fuel spray flames. soot concentrations inside the combustor are measured by filter paper technique. the simulation is based on the solution of the fully-coupled conservation equations for turbulent flow, chemical species kinetic modeling, fuel droplet evaporation and combustion and soo...

OBJECTIVES This study analyzed the kinetics of oxygen consumption during and after a maximal cardiopulmonary exercise test in patients with dilated cardiomyopathy. The prognostic information derived from indexes of recovery was also studied. BACKGROUND Previous studies have examined the kinetics of oxygen consumption during a short recovery period in a limited number of patients. To our knowl...

Better Predictors of Heart Failure Mortality Than Peak Exercise Oxygen Consumption To the Editor: We read with great interest the article by Robbins et al1 describing how exercise-related ventilatory and heart rate responses better predict heart failure mortality than peak exercise oxygen consumption.2 Although Robbins et al1 correctly state that other investigators have shown that exercise-rel...