Heart rate asymmetry in aortic valve stenosis patients

Heart rate asymmetry is one of the measure of the autonomic nervous system activity. Here we use the Phase Rectified Signal Averaging method for heart rate asymmetry calculations and focus on Deceleration Capacity (DC) obtained for aortic valve stenosis patients just before surgical replacement of the aortic valve. In the study we used 6-h nighttime data from 107 patients aged 60–71 y.