Method and apparatus for detecting ischemia using changes in QRS morphology
First Claim
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1. A method for detecting ischemia, comprising:
- generating a baseline QRS template;
determining absolute value of difference of voltage of a test QRS complex and voltage of the baseline QRS template at a plurality of sample points; and
detecting ischemia if a sum of the differences at the plurality of sample points is greater than an ischemia detection threshold.
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Abstract
A method for operating an implantable medical device includes determining the difference of the absolute value of the voltage of a test QRS complex and the voltage of a baseline QRS template at a plurality of corresponding sample points and detecting ischemia if the sum of the differences at the plurality of sample points is greater than an ischemia detection threshold.
29 Citations
24 Claims
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1. A method for detecting ischemia, comprising:
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generating a baseline QRS template; determining absolute value of difference of voltage of a test QRS complex and voltage of the baseline QRS template at a plurality of sample points; and detecting ischemia if a sum of the differences at the plurality of sample points is greater than an ischemia detection threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An implantable medical device, comprising:
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means for generating a baseline QRS template; means for determining absolute value of difference of voltage of a test QRS complex and voltage of the baseline QRS template at a plurality of sample points; and means for detecting ischemia if a sum of the differences at the plurality of sample points is greater than an ischemia detection threshold. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. An implantable medical device, comprising:
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a pulse generator adapted to deliver a plurality of pacing pulses to a patient'"'"'s heart; a sensing circuit adapted to sense QRS complexes; and a microcontroller adapted to determine absolute value of difference between voltage of a test QRS complex and voltage of a baseline QRS template at a plurality of sample points and to detect ischemia if a sum of the differences at the plurality of sample points is greater than an ischemia detection threshold. - View Dependent Claims (23, 24)
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Specification