5Orozco-Levi M, Lloreta J, Minguella J, et al. Injury of the hu- man diaphragm associated with exertion and chronic obstructive pulmonary disease. Am J Resp Crit Care, 2001, 164: 1734- 1739.
6Undem B J, Kollarik M. The role of vagal afferent nerves in chron- ic obstructive pulmonary disease. Proc Am Thorac Soc, 2005, 2 : 355 -360.
7Andreas S, Anker SD, Scanlon PD,et al. Neurohumoral activation as a link to systemic manifestations of chronic lung disease. CHEST J, 2005, 128: 3618-3624.
9Gunduz H, Talay F, Arinc H, et al. Heart rate variability and heart rate turbulence in patients with chronic obstructive pulmona- ry disease. Cardiol J, 2009, 16: 553-559.
10Vanderlei LCM, Pastre CM, Hoshi RA, et al. Basic notions of heart rate variability and its clinical applicability. Rev Bras Cir Cardiov, 2009, 24: 205-217.