Automated analysis of a cardiac signal based on dynamical characteristics of the cardiac signal
US7729753B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2006 |
| Grant date | Jun 1, 2010 |
| Priority date | — |
| Expiry date | Nov 19, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7239
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Systems and techniques relating to locating cardiac wave forms in a cardiac signal, and to detecting a physiological condition, such as ventricular fibrillation. In general, in one aspect, a machine-implemented method includes obtaining a sensed cardiac signal of an organism, the sensed cardiac signal comprising a time series x(t); applying a Hilbert (H) transform to the time series x(t) to obtain H(x(t)), wherein x(t) and H(x(t)) together forming a partial state space trajectory; determining a speed of trajectory, for the sensed cardiac signal, from the partial state space trajectory; and identifying physiological information concerning the organism based on a combination of first and second signal elements, the first signal element including a phase property or an amplitude property of the speed of trajectory, and the second signal element including an amplitude property of the partial state space trajectory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.