%0 Journal Article %T Impaired heart rate variability in patients with mitral annular calcification: an observational study %A Kurtoğlu, E. %A Aktürk, E. %A Korkmaz, H. %A Ataş, H. %A Pekdemir, H. %J The Anatolian Journal of Cardiology %D 2013 %V 13 %P 668-674 %R 10.5152/akd.2013.189