منابع مشابه
Running, walking, and hyperventilation causing asthma in children.
To examine further the relation between type of exercise, workload, ventilation, and exercise-induced asthma, we compared treadmill walking with treadmill running and treadmill running with isocapnic hyperventilation in separate studies in children and adolescents. Inspired air conditions were identical during each pair of tests. Walking and running with similar minute ventilation and 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 کاملHyperventilation-induced asthma: evidence for two mechanisms.
The mechanism by which airway cooling induces airflow obstruction in asthmatic subjects has not yet been established. Using a pair of isocapnic hyperventilation challenges, with a 40-minute interval, we looked for the presence of a refractory period in 19 asthmatic patients (aged 9-18 years). The subjects fell into two groups. The eight in the "non-refractory" group showed less than a 25% reduc...
متن کاملHyperventilation 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 کاملAnxiety, depression and hyperventilation symptoms in treatment-resistant severe asthma
Background Psychological morbidity is associated with frequent asthma exacerbations, higher health care utilization, as well as near-fatal and fatal asthma. The prevalence of psychological comorbidities in patients with severe asthma is not well-studied. The aim of our study was to evaluate the prevalence of anxiety, depression and hyperventilation, and correlate these symptoms with asthma cont...
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ژورنال
عنوان ژورنال: British Journal of Psychiatry
سال: 1989
ISSN: 0007-1250,1472-1465
DOI: 10.1192/bjp.154.4.576