Implantable cardioverter defibrillator with automatically adaptable sensing configuration
First Claim
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1. An implantable cardioverter defibrillator (ICD) comprising:
- a lead having a plurality of electrodes for providing a first EGM signal and a second EGM signal;
a first signal processing channel for producing a first set of sense signals based on the first EGM signal;
a second signal processing channel for producing a second set of sense signals based on the second EGM signal;
a therapy delivery circuit for providing an electrical therapy through the lead based on one of the first and second sets of sense signals; and
a control unit for analyzing the first and second sets of sense signals and the first and second EGM signals and selecting the set of sense signals used by the therapy delivery circuit.
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Abstract
An implantable cardioverter defibrillator (ICD) automatically determines whether to use electrogram (EGM) signals sensed by a true bipolar electrode pair or those sensed by an integrated bipolar electrode pair. EGM signals from both the true bipolar pair and the integrated bipolar pair are simultaneously sensed and compared to determine which pair produced more accurate sensing of cardiac events. The more accurate source of EGM signals is selected and used in determining the therapy to be delivered.
16 Citations
20 Claims
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1. An implantable cardioverter defibrillator (ICD) comprising:
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a lead having a plurality of electrodes for providing a first EGM signal and a second EGM signal;
a first signal processing channel for producing a first set of sense signals based on the first EGM signal;
a second signal processing channel for producing a second set of sense signals based on the second EGM signal;
a therapy delivery circuit for providing an electrical therapy through the lead based on one of the first and second sets of sense signals; and
a control unit for analyzing the first and second sets of sense signals and the first and second EGM signals and selecting the set of sense signals used by the therapy delivery circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable cardioverter defibrillator (ICD) comprising:
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a lead having a tip electrode, a ring electrode, and a coil electrode;
a true bipolar (TB) sensing circuit for delivering a true bipolar sensing signal from the tip electrode and the ring electrode;
an integrated bipolar (IB) sensing circuit for deriving an integrated bipolar sensing signal from the tip electrode and the coil electrode;
a control unit that compares the TB sensing signal and the IB sensing signal and selects one of the TB and IB sensing signals as a basis for therapy; and
a therapy delivery circuit for delivering therapy through at least one of the electrodes based on the sensing signal selected. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of delivering therapy with an implantable cardioverter defibrillator (ICD), the method comprising:
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simultaneously sensing EGM signals with a first electrode pair and a second electrode pair;
determining, based on the EGM signals, which electrode pair produced a more accurate detection of cardiac events; and
determining whether to deliver therapy based on EGM signals from the electrode pair selected. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification