Method and apparatus for quantifying beat-to-beat variability in physiologic waveforms
US4732157A · kind A · utility
51Cited by
6References
19Claims
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Key dates
| Filing date | Aug 18, 1986 |
| Grant date | Mar 22, 1988 |
| Priority date | — |
| Expiry date | Aug 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG16H50/30
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Myocardial electrical stability is assessed by sampling an ECG waveform at corresponding fiducial locations for a plurality of beats and creating a scatter plot of the i.sup.th sample versus the (i- 1)th sample. A parameter .lambda. is determined which minimizes the sum of the total distances of the points of the scatter plot to an equation x(i)= 4.lambda.x(i- 1)[ 1-x(i- 1)]. The value of the parameter .lambda. is related to the electrical stability of the heart.
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