Time transformation of local activation times
US9314179B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2014 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Sep 25, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7257
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An automatic method of determining local activation time (LAT) from at least four multi-channel cardiac electrogram signals including a ventricular channel, a mapping channel and a plurality of reference channels. The method comprises (a) storing the cardiac channel signals, (b) using the ventricular and mapping channel signals and a first reference channel signal to compute LAT values at a plurality of mapping-channel locations, (c) monitoring the timing stability of the first reference channel signal, and (d) if the timing stability of the monitored signal falls below a stability standard, using the signal of a second reference channel to determine LAT values. Substantial loss of LAT values is avoided in spite of loss of timing stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.