System and method for processing signals from intracardiac catheters
Inventors
Matthiesen, Mads Emil • Larsen, Sigge Nejst
Assignees
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Publication Number
US-10568534-B2
Publication Date
2020-02-25
Expiration Date
Abstract
A system for recording intracardiac signals and for providing stimulation pulses and/or ablation energy at intracardiac locations. The system includes intracardiac terminals adapted to collecting intracardiac electrophysiological potentials from respective intracardiac locations in an individual; an indifferent terminal adapted to collecting indifferent electro-physiological potentials from the individual; a differential amplifier stage adapted to receiving and amplifying the electrophysiological potentials collected from the intra-cardiac and indifferent terminals with respect to a signal reference to obtain respective intracardiac and indifferent signals; a processor device adapted to determining a common mode signal as an average of the intracardiac and indifferent signals and adapted to providing an output of intracardiac data based at least on the intracardiac signals, wherein the intracardiac signals are referenced with respect to the common mode signal. A method of processing intracardiac electrophysiological signals is also disclosed.
Core Innovation
The disclosed invention relates to a system for recording intracardiac signals and for providing stimulation pulses and/or ablation energy at intracardiac locations. The system includes a plurality of intracardiac terminals adapted to collecting intracardiac electrophysiological potentials from a plurality of passive intracardiac electrodes at respective intracardiac locations in an individual, and an indifferent terminal adapted to collecting indifferent electrophysiological potentials from one or more indifferent electrodes in or on the individual.
A differential amplifier stage is adapted to receiving and amplifying electrophysiological potentials collected from the intracardiac and indifferent terminals with respect to a signal reference to obtain respective intracardiac and indifferent signals. A processor device is adapted to determining a common mode signal as an average of the intracardiac and indifferent signals and providing an output of intracardiac data based at least on the intracardiac signals, where the intracardiac signals are referenced with respect to the common mode signal.
The described processing further supports referencing by deriving differential mode signals, including differential mode intracardiac signals and a differential mode indifferent signal, based on subtraction of the common mode signal. Additional output ensembles are described, including ensembles of unipolar intracardiac signals formed based on the indifferent signal and ensembles of bipolar intracardiac signals formed based on subtraction between intracardiac signals.
Claims Coverage
The independent claims are directed to a cardiac intracardiac sensing/recording system and a method for processing intracardiac signals. Both independent claims center on determining a common mode signal as an average of intracardiac and indifferent signals and referencing intracardiac signals with respect to that common mode signal.
Intracardiac and indifferent signal acquisition for common mode reference
A plurality of intracardiac terminals adapted to collecting intracardiac electrophysiological potentials from a plurality of passive intracardiac electrodes at respective intracardiac locations; an indifferent terminal adapted to collecting indifferent electrophysiological potentials from one or more indifferent electrodes; a differential amplifier stage adapted to receiving and amplifying the electrophysiological potentials collected from the intracardiac and indifferent terminals with respect to a signal reference to obtain respective intracardiac and indifferent signals.
Common mode signal as an average and referenced intracardiac output
A processor device adapted to determining a common mode signal as an average of the intracardiac and indifferent signals and adapted to providing an output of intracardiac data based at least on the intracardiac signals, wherein the intracardiac signals are referenced with respect to the common mode signal.
Processing method for common mode referencing of intracardiac signals
Receiving multiple sequences of electrophysiological potentials collected from a plurality of passive intracardiac electrodes via corresponding intracardiac terminals and from at least one indifferent electrode via a corresponding indifferent terminal; amplifying the electrophysiological potentials in a differential amplifier stage with respect to a signal reference to obtain respective intracardiac and indifferent signals; determining a common mode signal as an average of the intracardiac and indifferent signals; and providing an output of intracardiac data based at least on the intracardiac signals, wherein the intracardiac signals are referenced with respect to the common mode signal.
Across the independent claim set, the core claim coverage is the differential amplification of intracardiac and indifferent electrophysiological potentials, the determination of a common mode signal as an average of those signals, and the outputting of intracardiac data with intracardiac signals referenced to the common mode signal. Dependent claim refinements add specific differential-mode derivations and unipolar/bipolar intracardiac output ensembles.
Stated Advantages
Suppresses mains/common-mode noise while supporting stimulation/ablation using the same hardware.
Documented Applications
Recording intracardiac signals while providing stimulation pulses and/or ablation energy at intracardiac locations.
Processing intracardiac signals obtained from passive intracardiac electrodes together with an indifferent electrode for generation of intracardiac data referenced to a common mode signal.
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