Blocked Utilization of Oxygen in Pigs During Exercise
نویسندگان
چکیده
منابع مشابه
Low efficiency of oxygen utilization during exercise in hyperthyroidism.
STUDY OBJECTIVE The mechanism of exercise intolerance in hyperthyroidism has not been fully elucidated. This study was undertaken to determine if hyperthyroidism reduced the efficiency of sub-maximal exercise. STUDY DESIGN We measured cardiorespiratory variables up to the anaerobic threshold (AT) during ramp-loading cycle ergometry in 12 patients (New York Heart Association functional class I...
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...
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When people walk at low intensity after fasting, the energy needed is provided mostly by oxidation of plasma fatty acids. As exercise intensity increases (eg, to moderate running), plasma fatty acid turnover does not increase and the additional energy is obtained by utilization of muscle glycogen, blood glucose, and intramuscular triglyceride. Further increases in exercise intensity are fueled ...
متن کاملHeliox improves oxygen delivery and utilization during dynamic exercise in patients with chronic obstructive pulmonary disease.
RATIONALE Normoxic heliox (mixture of 79% He and 21% O(2)) may enhance exercise tolerance in patients with chronic obstructive pulmonary disease (COPD). It remains to be determined whether part of these beneficial effects could be ascribed to increased O(2) delivery (O(2)DEL) to locomotor muscles. OBJECTIVES To investigate the effects of heliox on peripheral O(2)DEL and utilization during exe...
متن کاملOxygen utilization and ventilation during exercise in patients with chronic cardiac failure.
Muscular work requires the integration of cardiopulmonary mechanisms for gas exchange and O2 delivery. In patients with chronic cardiac failure, the response of these mechanisms may be impaired, and the pattern of O2 utilization (VO2) and gas exchange during exercise would thus provide an objective assessment of the severity of heart failure. Accordingly, rates of air flow, O2 uptake, CO2 elimi...
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ژورنال
عنوان ژورنال: Acta Veterinaria Scandinavica
سال: 1973
ISSN: 1751-0147
DOI: 10.1186/bf03547436