peek value. But most of persons with double peaks even multi-peak are normal, which
mostly appears in the normal persons with bigger HRV.
The statistics of RR interval dispersion histogram is on the basis of the margin of two
neighboring RR Interval from sinus node (unit: ms). The horizontal axis is the margin of
two neighboring RR Interval from sinus node, the center is 0. The later RR Interval is
longer than the former one, the margin is plus, whereas the margin is negative. And the
vertical axis is the numbers of heartbeat.
The RR interval dispersion histogram reflects the difference of RR interval, namely, the
The RR interval histogram reflects the macroscopical degree of heart rate change.
The horizontal axis of the RR interval poincare graph(it reflects the whole change of heart
rate) is the RR which is the previous R-R interval length of two adjacent sinus cardiac
cycle. And the vertical axis is the next one. It has four shapes: (1) the comet shape (2) the
torpedo shape (3) the anomalous shape (4) the fan shape. The last three cases are
The horizontal axis of RR interval dispersion poincare is the difference of previous
neighboring RR Interval from sinus node, and the vertical axis is the difference of next
neighboring RR Interval from sinus node. The values distribute in the four quadrants
around the center. The more it’s in the second and fourth quadrants, the larger extent of
d
ispersion it shows and the larger HRV is.
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General