Time transformation of local activation times
AssigneeAPN Health, LLC
InventorsDonald Brodnick, Jasbir Sra
Life of this patent
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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.
Claims27
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 comprising:
- storing the cardiac channel signals;
- using the ventricular and mapping channel signals and a first reference channel signal to compute LAT values at a plurality of mapping-channel locations;
- monitoring the timing stability of the first reference channel signal;
- and
- if the timing stability of the monitored signal falls below a timing-stability standard, using a second reference channel signal to determine LAT values and avoid substantial loss of LAT values in spite of loss of timing stability.
Dependencies are inferred from the claim text.