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US 7,460,900 B1Granted
Method and apparatus for detecting ischemia using changes in QRS morphology
AssigneePacesetter, Inc.
InventorsJong Gill, Peter Boileau, Gene A. Bornzin
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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.
Claims24
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.
1 more element
An implantable medical device, comprising:
- 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.
1 more element
An implantable medical device, comprising:
- 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.
1 more element
Dependencies are inferred from the claim text.