Abstract:
:The pathophysiology of cough variant asthma is poorly understood. In particular, the mechanisms that cause different symptoms in typical asthma (in which wheeze predominates) compared with cough variant asthma (in which cough predominates) have not been determined. Traditional explanations include higher wheezing thresholds, differences in cough sensitivity, and/or differences in small airway function. Recent studies using high-dose methacholine challenge testing suggest that altered small-airway function plays a role. Preservation or loss of the bronchoprotective effect of a deep inspiration may be a fundamental pathophysiologic difference between asthma, cough variant asthma, methacholine-induced cough with normal sensitivity, and eosinophilic bronchitis.
journal_name
Lungjournal_title
Lungauthors
Lougheed MD,Turcotte SE,Fisher Tdoi
10.1007/s00408-011-9348-6subject
Has Abstractpub_date
2012-02-01 00:00:00pages
17-22issue
1eissn
0341-2040issn
1432-1750journal_volume
190pub_type
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