A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 5/0402 (2006.01) A61N 1/362 (2006.01)
Patent
CA 2095014
2095014 9209331 PCTABS00013 Far-field ventricular and (optionally) atrial electrograms of a suspect tachyarrhythmia are compared against stored morphologies of one or more control rhythms to allow discrimination between normal and pathologic tachyarrhythmias. The existence of a run of tachycardia is determined by an algorithm which compares the near-field atrial and ventricular electrograms against tachyarrhythmia rate thresholds and (optionally) rate acceleration, rate stability and/or sustained high rate criteria. When elevated rates are detected employing the near-field electrograms, far-field atrial electrograms are obtained by sensing between one of the bipolar electrodes in the ventricle and a remote indifferent electrode, typically on the pulse generator or at a location along the lead catheter but outside of the atrium. Similarly, far-field ventricular electrograms are obtained by sensing between one of the bipolar atrial electrodes and a remote indifferent electrode.
Duffin Edwin G.
Medtronic Inc.
Smart & Biggar
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