This content has been downloaded from IOPscience. Please scroll down to see the full text. Download details: IP Address: 134.147.5.252 This content was downloaded on 30/03/2015 at 09:15 Please note that terms and conditions apply. Symbolic transformations of heart rate variability preserve information about cardiac autonomic control View the table of contents for this issue, or go to the journal homepage for more 2015 Physiol. Meas. 36 643 (http://iopscience.iop.org/0967-3334/36/4/643) Home Search Collections Journals About Contact us My IOPscience