Implantable cardiac stimulation device for and method of monitoring progression or regression of heart disease by monitoring evoked response features
First Claim
1. An implantable cardiac stimulation device comprising:
- a pulse generator that generates pacing pulses for delivery to a heart;
a sensing circuit that senses electrical evoked responses of the heart and generates evoked response signals; and
circuitry connected to the pulse generator and the sensing circuit and that is operative to quantify at least one characteristic of the evoked response signals to provide corresponding quantized values, wherein the circuitry is further operative to process the quantized values to determine if progression or regression of the heart disease exists, and wherein the circuitry is operative to adjust at least one pacing parameter when progression or regression of the heart disease exists.
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Accused Products
Abstract
An implantable cardiac stimulation device has a system and method that monitors progression or regression in a patient'"'"'s heart disease. A pulse generator delivers pacing pulses to the heart to cause evoked responses of the heart. A sensing circuit senses the evoked responses of the heart and generates evoked response signals. A processor is programmed to analyze the evoked response signals, to isolate a given characteristic of the evoked response signals and to quantify the isolated characteristics to provide corresponding quantized values. Relative changes in the quantized values over time are indicative of the progression or regression in the patient'"'"'s heart disease. A memory stores the quantized values and a telemetry circuit transmits the stored quantized values to an external receiver for analysis.
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Citations
35 Claims
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1. An implantable cardiac stimulation device comprising:
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a pulse generator that generates pacing pulses for delivery to a heart;
a sensing circuit that senses electrical evoked responses of the heart and generates evoked response signals; and
circuitry connected to the pulse generator and the sensing circuit and that is operative to quantify at least one characteristic of the evoked response signals to provide corresponding quantized values, wherein the circuitry is further operative to process the quantized values to determine if progression or regression of the heart disease exists, and wherein the circuitry is operative to adjust at least one pacing parameter when progression or regression of the heart disease exists. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In an implantable cardiac stimulation device, a method comprising:
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applying stimulation pulses to a heart according to a set of pacing parameters;
sensing electrical evoked responses and providing corresponding evoked response signals;
monitoring at least one feature of the evoked response signals to provide corresponding quantized values;
processing the quantized values to determine if progression or regression of the heart disease exists; and
adjusting at least one of the pacing parameter when progression or regression of the heart disease exists. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. In an implantable cardiac stimulation device, a method of monitoring progression or regression of a patient'"'"'s heart disease, the method including the steps of:
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applying stimulation pulses to the heart to cause electrical evoked responses of the heart;
sensing the electrical evoked responses to provide evoked response signals;
quantifying at least one isolated feature of the evoked response signals to provide corresponding quantified values, the quantified values over time being indicative of the progression or regression of the patient'"'"'s heart disease;
storing the quantified values in a memory;
conveying the stored quantified values to an external receiver for analysis;
processing the quantified values to determine if progression or regression of the heart disease exists; and
adjusting at least one pacing parameter when progression or regression of the heart disease exists. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. In an implantable cardiac stimulation device, a system for monitoring progression or regression of a patients heart disease, comprising;
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stimulation means for applying stimulation pulses to the heart and causing electrical evoked responses of the heart;
analyzing means for analyzing the electrical evoked responses for quantifying at least one isolated feature of the electrical evoked responses to provide corresponding quantified values, the quantified values over time being indicative of the progression or regression of the patient'"'"'s heart disease;
memory means for storing the quantified values;
telemetry means for conveying the stored quantified values to a nonimplanted receiver for analysis;
means for determining if progression or regression of the heart disease exists from the quantified values; and
means for adjusting at least one pacing parameter when progression or regression of the heart disease exists. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. In an implantable cardiac stimulation device, a system that monitors progression or regression in a patients heart disease, the system comprising:
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a pulse generator that delivers pacing pulses to the heart to cause electrical evoked responses of the heart;
a sensing circuit that senses the electrical evoked responses of the heart to generate evoked response signals;
a processor programmed to analyze the evoked response signals, to isolate a given characteristic of the evoked response signals and to quantify the isolated characteristics to provide corresponding quantized values, relative changes in the quantized values over time being indicative of the progression or regression in the patient'"'"'s heart disease;
a memory that stores the quantized values;
a telemetry circuit that transmits the stored quantized values to an external receiver for analysis; and
circuitry that is operative to process the quantized values to determine if progression or regression of the heart disease exists, wherein the circuitry is operative to adjust at least one pacing parameter when progression or regression of the heart disease exists. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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Specification