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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: Respir Physiol Neurobiol. 2014 Sep 28;0:99–111. doi: 10.1016/j.resp.2014.09.013

Figure 6. Temporal Poincaré variability (TPV) plots revealed differences in the structure HRV after SDB.

Figure 6

A. Baseline: from τ=1 to 5, an oscillation is present at each increment of 1 RR Interval and there are hints of an oscillation at higher τ.

B. Slow, deep breathing: The oscillation is absent distribution formed an ellipse which became a circular cloud at higher τ.

C. Recovery: The oscillation is accentuated. Further, the oscillation is absent in the Poincaré plot from the 1st half of the data set and SDSD is very low, whereas in the 2nd half SDSD increases and the amplitude of the oscillation is accentuated.