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Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 8
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Imprime registro no formato completo
Dynamics of chest wall volume regulation during constant work rate exercise in patients with chronic obstructive pulmonary disease BJMBR
Takara,L.S.; Cunha,T.M.; Barbosa,P.; Rodrigues,M.K.; Oliveira,M.F.; Nery,L.E.; Neder,J.A..
This study evaluated the dynamic behavior of total and compartmental chest wall volumes [(V CW) = rib cage (V RC) + abdomen (V AB)] as measured breath-by-breath by optoelectronic plethysmography during constant-load exercise in patients with stable chronic obstructive pulmonary disease. Thirty males (GOLD stages II-III) underwent a cardiopulmonary exercise test to the limit of tolerance (Tlim) at 75% of peak work rate on an electronically braked cycle ergometer. Exercise-induced dynamic hyperinflation was considered to be present when end-expiratory (EE) V CW increased in relation to resting values. There was a noticeable heterogeneity in the patterns of V CW regulation as EEV CW increased non-linearly in 17/30 "hyperinflators" and decreased in 13/30...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exertion; Lung mechanics; COPD; Dyspnea; Exercise test.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001200024
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Effect of exercise training on ventilatory efficiency in patients with heart disease: a review BJMBR
Prado,D.M.L.; Rocco,E.A.; Silva,A.G.; Rocco,D.F.; Pacheco,M.T.; Furlan,V..
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. Exercise training has been recommended as non-pharmacological treatment for patients with different chronic cardiopulmonary diseases. In this respect, previous studies have reported...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Heart disease; Ventilatory efficiency; Exercise test; Exercise training.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000700301
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Imprime registro no formato completo
Effects of high- and moderate-intensity exercise on central hemodynamic and oxygen uptake recovery kinetics in CHF-COPD overlap BJMBR
Mazzuco,A.; Souza,A.S.; Medeiros,W.M.; Sperandio,P.A.; Alencar,M.C.N.; Arbex,F.F.; Neder,J.A.; Borghi-Silva,A..
The oxygen uptake (V˙O2) kinetics during onset of and recovery from exercise have been shown to provide valuable parameters regarding functional capacity of both chronic obstructive pulmonary disease (COPD) and chronic heart failure (CHF) patients. To investigate the influence of comorbidity of COPD in patients with CHF with reduced ejection fraction on recovery from submaximal exercise, 9 CHF-COPD male patients and 10 age-, gender-, and left ventricle ejection fraction (LVEF)-matched CHF patients underwent constant-load exercise tests (CLET) at moderate and high loads. The V˙O2, heart rate (HR), and cardiac output (CO) recovery kinetics were determined for the monoexponential relationship between these variables and time. Within-group analysis showed that...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chronic heart failure; Chronic obstructive pulmonary disease; Oxygen uptake; Heart rate; Recovery kinetics; Exercise test.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000300602
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Exercise may cause myocardial ischemia at the anaerobic threshold in cardiac rehabilitation programs BJMBR
Fuchs,A.R.C.N.; Meneghelo,R.S.; Stefanini,E.; De Paola,A.V.; Smanio,P.E.P.; Mastrocolla,L.E.; Ferraz,A.S.; Buglia,S.; Piegas,L.S.; Carvalho,A.A.C..
Myocardial ischemia may occur during an exercise session in cardiac rehabilitation programs. However, it has not been established whether it is elicited when exercise prescription is based on heart rate corresponding to the anaerobic threshold as measured by cardiopulmonary exercise testing. Our objective was to determine the incidence of myocardial ischemia in cardiac rehabilitation programs according to myocardial perfusion SPECT in exercise programs based on the anaerobic threshold. Thirty-nine patients (35 men and 4 women) diagnosed with coronary artery disease by coronary angiography and stress technetium-99m-sestamibi gated SPECT associated with a baseline cardiopulmonary exercise test were assessed. Ages ranged from 45 to 75 years. A second...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exercise test; Anaerobic threshold; Myocardial ischemia; Coronary artery disease; Technetium; 99mTc-sestamibi.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000300008
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Imprime registro no formato completo
Exercise stress testing before and after successful multivessel percutaneous transluminal coronary angioplasty BJMBR
Chalela,W.A.; Kreling,J.C.; Falcão,A.M.; Hueb,W.; Moffa,P.J.; Pereyra,P.L.A.; Ramires,J.A.F..
Controversy exists regarding the diagnostic accuracy, optimal technique, and timing of exercise testing after percutaneous coronary intervention. The objectives of the present study were to analyze variables and the power of exercise testing to predict restenosis or a new lesion, 6 months after the procedure. Eight-four coronary multi-artery diseased patients with preserved ventricular function were studied (66 males, mean age of all patients: 59 ± 10 years). All underwent coronary angiography and exercise testing with the Bruce protocol, before and 6 months after percutaneous coronary intervention. The following parameters were measured: heart rate, blood pressure, rate-pressure product (heart rate x systolic blood pressure), presence of angina, maximal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Exercise test; Coronary artery disease; Percutaneous transluminal coronary angioplasty; Coronary multi-artery disease.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000400007
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Hemodynamic mechanisms of the attenuated blood pressure response to mental stress after a single bout of maximal dynamic exercise in healthy subjects BJMBR
Neves,F.J.; Carvalho,A.C.G.; Rocha,N.G.; Silva,B.M.; Sales,A.R.K.; Castro,R.R.T. de; Rocha,J.D.; Thomaz,T.G.; Nóbrega,A.C.L..
To determine the hemodynamic mechanisms responsible for the attenuated blood pressure response to mental stress after exercise, 26 healthy sedentary individuals (age 29 ± 8 years) underwent the Stroop color-word test before and 60 min after a bout of maximal dynamic exercise on a treadmill. A subgroup (N = 11) underwent a time-control experiment without exercise. Blood pressure was continuously and noninvasively recorded by infrared finger photoplethysmography. Stroke volume was derived from pressure signals, and cardiac output and peripheral vascular resistance were calculated. Perceived mental stress scores were comparable between mental stress tests both in the exercise (P = 0.96) and control (P = 0.24) experiments. After exercise, the blood pressure...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cardiovascular system; Blood pressure; Exercise test; Stroop test.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000700007
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Imprime registro no formato completo
Influence of expiratory positive airway pressure on cardiac autonomic modulation at rest and in submaximal exercise in COPD patients BJMBR
da L. Goulart,C.; San Martin,E.A.; Mansour,K.M.K.; Schneiders,P.B.; da Silva,A.L.G..
The aim of this study was to evaluate the effect of expiratory positive airway pressure (EPAP) on heart rate variability (HRV) indices at rest and during 6-min walk test (6MWT) in chronic obstructive pulmonary disease (COPD) patients. Fifteen moderate to severe COPD patients were randomized and evaluated with and without (Non-EPAP) a 5 cmH2O EPAP device. Respiratory rate (RR) was collected at rest (5 min), during the 6MWT (5 min), and at recovery (5 min). Indices of HRV were computed in the time domain, in the frequency domain, and nonlinear analysis. For EPAP and Non-EPAP during the 6MWT, we found an increased mean heart rate (HR) (P=0.001; P=0.001) while mean RR (P=0.001; P=0.015) and RR tri index decreased (P=0.006; P=0.028). Peripheral oxygen...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Autonomic nervous system; HRV; COPD; Positive-pressure respiration; Exercise test.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000600605
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Imprime registro no formato completo
Subacute effects of a maximal exercise bout on endothelium-mediated vasodilation in healthy subjects BJMBR
Bousquet-Santos,K.; Soares,P.P.S.; Nóbrega,A.C.L..
We evaluated vascular reactivity after a maximal exercise test in order to determine whether the effect of exercise on the circulation persists even after interruption of the exercise. Eleven healthy sedentary volunteers (six women, age 28 ± 5 years) were evaluated before and after (10, 60, and 120 min) a maximal exercise test on a treadmill. Forearm blood flow (FBF) was measured by venous occlusion plethysmography before and during reactive hyperemia (RH). Baseline FBF, analyzed by the area under the curve, increased only at 10 min after exercise (P = 0.01). FBF in response to RH increased both at 10 and 60 min vs baseline (P = 0.004). Total excess flow for RH above baseline showed that vascular reactivity was increased up to 60 min after exercise (mean ±...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vascular reactivity; Exercise test; Blood flow; Plethysmography.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400017
Registros recuperados: 8
Primeira ... 1 ... Última
 

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