Methods and devices implementing dual criteria for arrhythmia detection
AssigneeCameron Health, Inc.
InventorsVenugopal Allavatam, Rick Sanghera
Life of this patent
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Abstract
Methods and devices providing multiple criteria for use in arrhythmia identification. Based on inputs including defined rules or parameters, one of a more conservative or more aggressive set of arrhythmia identification parameters can be selected. One or the other of the selectable sets of arrhythmia identification parameters may also be adaptive or modifiable during the use of the system, for example, in response to identified nonsustained episodes, the more conservative set of arrhythmia identification parameters can be modified to become still more conservative. Such modification of arrhythmia identification criteria allows reduced time to therapy when indicated, while allowing more deliberate decisions in other circumstances.
Claims20
An implantable cardiac stimulus device comprising electrodes coupled to operational circuitry for sensing cardiac activity and detecting events in the cardiac activity, the operational circuitry further being configured to deliver therapy in response to identified conditions, wherein the operational circuitry is configured to:
- observe features of a cardiac signal for a set of detected events and use the observed features to select from at least:
- a) a first set of arrhythmia identification parameters;
- b) a second set of arrhythmia identification parameters;
- and
- c) a third set of arrhythmia identification parameters;
- and
- use the selected set of arrhythmia identfication parameters to analyze the sensed cardiac activity;
- wherein the first set of arrhythmia identification parameters is different from at least the second set of arrhythmia identification parameters;
- and
- wherein the operational circuitry is configured to observe features of the cardiac signal for the set of detected events by determining whether the cardiac signal is polymorphic or monomorphic and, if a polymorphic cardiac signal is observed, to select the first set of arrhythmia identification parameters in order to reduce time to therapy in the presence of the polymorphic cardiac signal.
A method of cardiac signal analysis in an implantable cardiac device, the implantable cardiac device comprising electrodes coupled to operational circuitry for sensing cardiac activity and performing cardiac signal analysis, the method comprising:
- observing features of the cardiac signal for a set of detected events and using the observed features to select from:
- a) a first set of arrhythmia identification parameters;
- b) a second set of arrhythmia identification parameters;
- and
- c) a third set of arrhythmia identification parameters;
- and
- using the selected set of arrhythmia identification parameters to analyze the sensed cardiac activity;
- wherein the first set of arrhythmia identification parameters is different from at least the second set of arrhythmia identification parameters;
- and
- wherein the operational circuitry is configured to observe features of the cardiac signal for the set of detected events by determining whether the cardiac signal is polymorphic or monomorphic, and, if a polymorphic cardiac signal is observed, to select the first set of arrhythmia identification parameters in order to reduce time to therapy in the presence of the polymorphic cardiac signal.
An implantable cardiac stimulus device comprising electrodes coupled to operational circuitry for sensing cardiac activity and detecting events in the cardiac activity, the operational circuitry further being configured to deliver therapy in response to identified conditions, wherein the operational circuitry is configured to:
- observe features of a cardiac signal for a set of detected events and use the observed features to select from at least:
- a) a first set of arrhythmia identification parameters;
- b) a second set of arrhythmia identification parameters;
- and
- c) a third set of arrhythmia identification parameters;
- and
- use the selected set of arrhythmia identification parameters to analyze the sensed cardiac activity;
- wherein the first set of arrhythmia identification parameters is different from at least the second set of arrhythmia identification parameters;
- wherein the operational circuitry is configured to observe features of the cardiac signal for the set of detected events by determining whether the cardiac signal is polymorphic or monomorphic;
- and
- wherein if the cardiac signal is polymorphic, the operation circuitry is configured to select the first set of arrhythmia identification parameter to reduce time to therapy if a polymorphic signal is identified, and if the cardiac signal is monomorphic, the operation circuitry is configured to select one of the second or third sets of arrhythmia identification parameters.
Dependencies are inferred from the claim text.