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. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: Congest Heart Fail. 2012 Apr 26;18(4):192–197. doi: 10.1111/j.1751-7133.2011.00282.x

Figure 2.

Figure 2

Raw, unadjusted mean changes (± SD) in heart rate variability parameters in the exercise training group stratified by gender (panel A: black boxes represent men; white boxes represent women), and by heart failure categories (panel B: black boxes represent heart failure and preserved ejection fraction; white boxes represent heart failure and reduced ejection fraction). SDNN = the standard deviation of all normal RR intervals; RMSSD = the root mean square of successive differences in normal RR intervals.