Heart Rate Asymmetry in Aortic Valve Stenosis Patients - Monika Petelczyc; Olga Lipinska; Ewa Orlowska-Baranowska; Rafal Baranowski; Jan J. Zebrowski (Computing in Cardiology, CinC 2013, Zaragoza, Spain, September 22-25, 2013, 2013)