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. Author manuscript; available in PMC: 2015 Sep 20.
Published in final edited form as: Int J Cardiol. 2014 Jul 11;176(2):367–374. doi: 10.1016/j.ijcard.2014.07.011

Figure 3. Frequency Domain Heart Rate Variability at Study Exit during Mental Arithmetic Stress Test.

Figure 3

When stratified by time domain HRV measures associated with adverse CV prognosis (SDNN < 50 ms [37], rMSSD <17 ms [38], and pNN50 <4%[39]), the percentage of subjects with an improved SDNN and pNN50 was higher with TA vs. SA at exit compared to baseline.