Functional results of unilateral lung volume reduction surgery in alpha1-antitrypsin deficient patients

Lung volume reduction surgery (LVRS) has been shown to improve lung function and exercise tolerance in patients with severe emphysema. Some predictors of poor outcome have been described but the role of alpha1-antitrypsin (alpha1-AT) deficiency is still not well known. The aim of this study was to analyze the results of unilateral LVRS in our center according to the alpha1-AT status. The results of LVRS in 17 deficient patients and 35 nondeficient patients were analyzed at 3-6 months and 1 year after surgery. Compared with baseline, a significant improvement of FEV1, partial pressure in arterial blood (PaO2), dyspnea score and walking distance was observed in the two groups at 3-6 months after surgery and the studied parameters remained significantly improved at 1 year in the nondeficient group. By contrast, PaO2 and walking distance returned towards baseline in the deficient group at 1 year whereas improvement of FEV1 and dyspnea score was persistent. Mean values of FEV, at baseline, 3-6 months, and 1 year were 22 +/- 6%, 29 +/- 11%, and 26 +/- 9% and 28 +/- 12%, 38 +/- 17%, and 40 +/- 17% predicted in the deficient group and in the non-deficient group, respectively. In conclusion, the functional benefit is short-lasting in alpha1-AT deficient patients after unilateral LVRS.