Frequency processing of an RR series in an analogue cardiac...

Details Frequency processing of an RR series in an analogue cardiac... Frequency processing of an RR series in an analogue cardiac...

2011-03-01

2011-03-01

Patel, Niketa I (Department: 3762)

Surgery

Diagnostic testing

Cardiovascular

C600S509000, C600S511000, C600S519000

Reexamination Certificate

active

07899523

ABSTRACT:
The RR series, comprising a number of samples respectively defining the time interval between two successive heartbeats, is filtered by means of a digital band-pass filter (Fk), having a given band-pass [fc; f′c] and preferably by means of a recursive elective filter (RII). A variability index (Ik), is calculated which is a function of the instantaneous amplitude [vs(n)] of the discrete signal (Sk) coming from said band-pass filter. The variability index (Ik) is preferably a function of and particularly equal to the effective value of the discrete signal (Sk) from the band-pass filter.

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