Hyperventilation of exercise to induce asthma?
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چکیده
منابع مشابه
Hyperventilation or exercise to induce asthma?
Bronchoconstriction was induced in asthmatic patients by means of isocapnic hyperventilation with dry air. Responses both within a day and between days did not differ significantly and corresponded closely with those observed after exercise. The mean fall in forced expiratory volume in one second (FEV1) observed with both techniques was equivalent to 36%. Isocapnic hyperventilation with dry air...
متن کاملCirculating catecholamines in exercise and hyperventilation induced asthma.
Plasma noradrenaline, adrenaline, and cyclic 3'5' AMP (cAMP) were measured in seven asthmatic patients with known exercise-induced bronchospasm and six matched non-atopic control subjects during a standard treadmill exercise test and then during matched isocapnic hyperventilation. Normal subjects showed a 5.5 fold rise in noradrenaline and a 3.2 fold rise in adrenaline during exercise compared ...
متن کاملHyperventilation during exercise: independence on exercise-induced bronchoconstriction in mild asthma.
Ventilatory gas exchange during exercise was compared in patients with mild asthma (11 females and 11 males), hyperventilation syndrome (HVS, 11 females), and healthy subjects (11 females and 11 males) in order to assess hyperventilation during exercise and its association with exercise-induced bronchoconstriction. The asthmatics showed decreased working capacity and decreased maximal oxygen co...
متن کاملHyperventilation and asymptomatic chronic asthma.
BACKGROUND We have consistently argued that mild asthma is an important underlying aetiological factor in patients with severe symptomatic hyperventilation. While hyperventilation has been demonstrated in acute asthma, there have been few studies in mild chronic asthma, and mechanisms are uncertain. METHODS Twenty three currently asymptomatic chronically asthmatic patients (occasional use of ...
متن کاملStudy of Chenopodium Album Allergenic Extract to Induce Allergic Asthma in Murine Model
Background: The incidence of allergic and asthmatic diseases has been continuously increased in both industrial and developing countries. Extracts from various known allergens are used for the diagnostic and therapeutic purposes. Objective: To investigate the effects of an extract prepared from Chenopodium album (Ch.A.) pollen to induce allergic asthma in BALB/C mice. Methods: BALB/C mice were ...
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ژورنال
عنوان ژورنال: Thorax
سال: 1981
ISSN: 0040-6376
DOI: 10.1136/thx.36.8.596