GLOSSARY OF TERMS USED IN TIME SERIES ANALYSIS
OF CARDIOVASCULAR DATA
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INTEGRAL PULSE FREQUENCY MODULATION MODEL

System which transforms a continuous input signal into an event series.

The input signal m(t) is integrated yielding y(t). When y(t) reaches the fixed reference value R, a pulse is emitted and the integrator is reset to 0, whereupon the cycle starts again. Output of the model is the series of pulses p(t). When used to model the cardiac pace-maker, the input is a signal proportional to the accelerating autonomic efferences on the pace-maker cells and the output is the cardiac event series.

Rompelman O et al.I (1977) Measurement in heart-rate variability: Part1 – Comparative study of hear-rate variability analysis methods. Med Biol Eng  Comput.
Nakao M et al (1997) Spectral distortion properties of the integral pulse frequency modulation model. IEEE Trans.Biomed.Eng.
Seydnejad SR, Kitney RI (1997) Real-time heart rate variability extraction using the Kaiser window.  IEEE Trans Biomed Eng.
Mitov V (2001) Spectral analysis of heart rate variability using the integral pulse frequency modulation model.Med Biol Eng Comput.

(PC 07-09-1999)

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