%0 Journal Article %T The acute effect of bi-level positive airway pressure on heart rate variability in chronic obstructive pulmonary disease patients with hypercapnic respiratory failure %A Yazıcı, M. %A Uzun, K. %A Ülgen, M.S. %A Teke, T. %A Maden, E. %A Kayrak, M. %A Turan, Y. %A Arı, H. %J The Anatolian Journal of Cardiology %D 2008 %V 8 %P 426-430 %R