Efficacy of Bronchial Thermoplasty in Korean

Inclusion Criteria: * 1\) Eighteen-year-old or older * 2\) Patients whose asthma is not controlled with more than three months of using high dose inhaled steroids and long acting β2-agonists * 3\) Patients with pre-bronchodilator FEV1 is between sixty and eighty-five% * 4\) Patients who do not improve through continuous drug uses. Exclusion Criteria: * 1\) Presence of a pacemaker, internal defibrillator, or other implantable electronic devices, * 2\) Known sensitivity to medications required to perform bronchoscopy, including lidocaine, atropine, and benzodiazepines. * 3\) Patients previously treated with the Alair System should not be retreated in the same area(s). No clinical data are available studying the safety and/or effectiveness of repeat treatments. * 4)Active respiratory infection * 5\) Asthma exacerbation or changing dose of systemic corticosteroids for asthma (up or down) in the past 14 days. * 6\) Known coagulopathy. * 7\) As with other bronchoscopic procedures, patients should stop taking anticoagulants, antiplatelet agents, aspirin and NSAIDS before the procedure with physician guidance.