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. Author manuscript; available in PMC: 2013 Jul 17.
Published in final edited form as: IEEE Trans Inf Technol Biomed. 2012 May 7;16(5):869–877. doi: 10.1109/TITB.2012.2198071

Fig. 9.

Fig. 9

Variability in beat-to-beat R-AC delay for (a) Subject 1 and (b) Subject 2. Each data point corresponds to the difference in the R-AC delay for two consecutive cycles plotted against the heart rate defined by the first cycle.