GLOSSARY OF TERMS USED IN TIME SERIES ANALYSIS
OF CARDIOVASCULAR DATA
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INTERVAL FUNCTION

HRV signal defined as the series of RR-interval durations as a function of time.

If tn is the occurrence time of the n-th R-wave, the interval function IF(t) is given by:

Rompelman O et al.I (1977) Measurement in heart-rate variability: Part1 – Comparative study of hear-rate variability analysis methods. Med Biol Eng  Comput.
(PC 07-09-1999)

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