System for verifying the integrity of cardiac complex templates
First Claim
1. A device, comprising:
- a morphology analyzer adapted to extract and measure sensed cardiac complex parameter values;
a template generating circuit connected to the morphology analyzer and adapted to receive the sensed cardiac complex parameter values and generate a cardiac complex template; and
a template comparison circuit connected to the template generating circuit and adapted to compare sensed cardiac complex parameter values to reference cardiac parameter values to determine if the sensed cardiac complex parameter values and the reference cardiac parameter values have a difference greater than a threshold,wherein the template comparison circuit and the template generating circuit cooperate to update the cardiac complex template upon determining that the difference is greater than the threshold.
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Abstract
A method and system for verifying the integrity of normal sinus rhythm (NSR) templates and updating the NSR template after selected time intervals. At selected time intervals after establishing a NSR template, cardiac complexes are sensed and values for one or more cardiac parameters are measured. The values of the cardiac parameters are compared to predetermined value ranges for NSR cardiac complexes. When the values of the cardiac parameters fall within the predetermined value ranges, values for the differences between the values of the cardiac parameters for the cardiac complexes and the values for the cardiac parameters of the NSR cardiac complexes are calculated. When the values of the differences are greater than one or more threshold values, the NSR template is updated as a function of the sensed cardiac complexes.
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Citations
22 Claims
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1. A device, comprising:
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a morphology analyzer adapted to extract and measure sensed cardiac complex parameter values; a template generating circuit connected to the morphology analyzer and adapted to receive the sensed cardiac complex parameter values and generate a cardiac complex template; and a template comparison circuit connected to the template generating circuit and adapted to compare sensed cardiac complex parameter values to reference cardiac parameter values to determine if the sensed cardiac complex parameter values and the reference cardiac parameter values have a difference greater than a threshold, wherein the template comparison circuit and the template generating circuit cooperate to update the cardiac complex template upon determining that the difference is greater than the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A device, comprising:
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input circuitry configured to be electrically connected to at least one electrode to sense cardiac complexes; a morphology analyzer circuit connected to the input circuitry and configured to measure sensed cardiac complex parameter values; a template generating circuit connected to the morphology analyzer circuit and configured to receive the sensed cardiac complex parameter values and generate a complex cardiac template; a template comparison circuit connected to the template generating circuit and adapted to compare sensed cardiac complex parameter values to reference cardiac parameter values after a time interval has elapsed to determine if the sensed cardiac complex parameter values and the reference cardiac parameter values have a difference greater than a threshold; and a microprocessor operably connected to the input circuitry, the morphology analyzer circuit, the template generating circuit, and the template comparison circuit, wherein the microprocessor includes a timer for determining the time interval, wherein the template comparison circuit and the template generating circuit cooperate to update the cardiac complex template upon determining that the difference is greater than the threshold. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification