Gas exchange responses to ramp exercise.
نویسندگان
چکیده
منابع مشابه
Use of Noninvasive Gas Exchange to Track Pulmonary Vascular Responses to Exercise in Heart Failure
We determined whether a non-invasive gas exchange based estimate of pulmonary vascular (PV) capacitance [PVCAP = stroke volume (SV) × pulmonary arterial pressure (Ppa)] (GXCAP) tracked the PV response to exercise in heart-failure (HF) patients. Pulmonary wedge pressure (Ppw), Ppa, PV resistance (PVR), and gas exchange were measured simultaneously during cycle exercise in 42 HF patients undergoi...
متن کاملGas exchange responses to constant work rate exercise in chronic cardiac failure.
OBJECTIVE To examine the time course of changes in minute oxygen consumption and other gas exchange variables and heart rate during constant work rate exercise in patients with chronic cardiac failure. DESIGN Treadmill exercise with on line measurement of gas exchange and a target duration of 10 minutes. SUBJECTS Seven men in New York Heart Association class II, six in class III, and seven ...
متن کاملPulmonary gas exchange during exercise in pigs.
Increased ventilation-perfusion (VA/Q) inequality is observed in approximately 50% of humans during heavy exercise and contributes to the widening of the alveolar-arterial O2 difference (A-aDO2). Despite extensive investigation, the cause remains unknown. As a first step to more direct examination of this problem, we developed an animal model. Eight Yucatan miniswine were studied at rest and du...
متن کاملGas exchange during exercise in habitually active asthmatic subjects.
We determined the relations among gas exchange, breathing mechanics, and airway inflammation during moderate- to maximum-intensity exercise in asthmatic subjects. Twenty-one habitually active (48.2 +/- 7.0 ml.kg(-1).min(-1) maximal O2 uptake) mildly to moderately asthmatic subjects (94 +/- 13% predicted forced expiratory volume in 1.0 s) performed treadmill exercise to exhaustion (11.2 +/- 0.15...
متن کاملAnaerobic threshold and respiratory gas exchange during exercise.
The effect of oral doses of the beta 1-selective adrenoceptor antagonist atenolol (50 mg), the non-selective antagonist propranolol (40 mg) and placebo was investigated during exercise in a crossover comparison in six healthy but untrained subjects. Descriptors of ventilation, respiratory gas exchange, and arterialized blood lactate and glucose were obtained during steady state bicycle ergometr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Annals of physiological anthropology
سال: 1990
ISSN: 0287-8429
DOI: 10.2114/ahs1983.9.167