Method and system for verifying the integrity of normal sinus rhythm templates
First Claim
1. A medical 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 normal sinus rhythm (NSR) template; and
a template comparison circuit connected to the template generating circuit and adapted to compare sensed cardiac complex parameter values to predetermined cardiac parameter values, wherein the template comparison circuit and the template generating circuit cooperate to update the NSR template based on the compared sensed cardiac complex parameter values and the predetermined cardiac parameter values.
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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
37 Claims
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1. A medical 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 normal sinus rhythm (NSR) template; and
a template comparison circuit connected to the template generating circuit and adapted to compare sensed cardiac complex parameter values to predetermined cardiac parameter values, wherein the template comparison circuit and the template generating circuit cooperate to update the NSR template based on the compared sensed cardiac complex parameter values and the predetermined cardiac parameter values. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device, comprising:
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input circuitry adapted to be electrically connected to at least one electrode to sense cardiac complexes including normal sinus rhythm (NSR) cardiac complexes;
a morphology analyzer circuit connected to the input circuitry and adapted to measure sensed cardiac complex parameter values;
a template generating circuit connected to the morphology analyzer circuit and adapted to receive the sensed cardiac complex parameter values and generate a NSR template; and
a template comparison circuit connected to the template generating circuit and adapted to compare sensed cardiac complex parameter values to predetermined cardiac parameter values after a selected time interval has elapsed, wherein the template comparison circuit and the template generating circuit cooperate to update the NSR template based on the compared sensed cardiac complex parameter values and the predetermined cardiac parameter values. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A device, comprising:
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means for comparing one or more sensed cardiac complex parameter values to one or more predetermined cardiac complex parameter values;
means for determining whether the one or more sensed cardiac complex parameter values and the one or more predetermined cardiac complex parameter values have differences greater than a threshold; and
means for updating a normal sinus rhythm (NSR) template upon determining that the one or more sensed cardiac complex parameter values and the one or more predetermined cardiac complex parameter values have differences that are greater than the threshold. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A device, comprising:
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means for creating a normal sinus rhythm (NSR) template;
means for determining whether sensed cardiac complex parameter values are within a range of normal values;
means for comparing the sensed cardiac complex parameter values to predetermined cardiac complex parameter values, upon determining that the sensed cardiac complex parameter values are within a range of normal values;
means for determining whether the sensed cardiac complex parameter values and the predetermined cardiac complex parameter values have differences greater than a threshold; and
means for updating the NSR template upon determining that the sensed cardiac complex parameter values and the predetermined cardiac complex parameter values have differences that are greater than the threshold. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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Specification