Patent Document ID: 7647104
Application ID: 11549517
Patent Flag: 1

Claim One:
1. A method, comprising: sensing a test IEGM waveform; sensing a plurality of IEGM waveforms; generating a long term ensemble average of the plurality of IEGM waveforms; generating a short term ensemble average of at least a portion of the plurality of IEGM waveforms; determining a short term absolute point difference as a function of a difference of an amplitude of the short term ensemble average and the test IEGM waveform at a plurality of sample points; determining a long term absolute point difference as a function of a difference of an amplitude of the long term ensemble average and the test IEGM waveform at a plurality of sample points; and detecting ischemia if a difference between the short term absolute point difference and the long term absolute point difference is greater than an ischemia detection threshold.