Analysis of the alternans cycle to cycle and/or the...

Details Analysis of the alternans cycle to cycle and/or the... Analysis of the alternans cycle to cycle and/or the...

2007-05-22

2007-05-22

Pezzuto, Robert E. (Department: 3766)

Surgery

Diagnostic testing

Cardiovascular

C600S516000, C607S025000

Reexamination Certificate

active

10865682

ABSTRACT:
A device for the analysis of the alternans cycle to cycle and/or the variability of the ventricular repolarization wave in an ECG signal. This device extracts from an ECG signal, for each cardiac beat, a temporal segment of T samples of the ventricular repolarization wave, considered as from a moment t following a predetermined temporal origin. The T samples for B consecutive beats are aggregated and a local variance factor is evaluated. The square root of the local variance is obtained and weighted by a factor of local alternans. The device delivers at the output an index of alternans and variability TVarbfunction, for a given beat, local variance factor weighted by the factor of local alternans.

REFERENCES:
patent: 5348020 (1994-09-01), Hutson
patent: 5921940 (1999-07-01), Verrier et al.
patent: 6823213 (2004-11-01), Norris et al.
patent: 2003/0233050 (2003-12-01), Haghighi-Mood et al.

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