Combination of electrogram and intra-cardiac pressure to discriminate between fibrillation and tachycardia
First Claim
1. A method for detecting and classifying an arrhythmia, comprising:
- sensing a cardiac electrogram signal;
determining a cardiac rate in response to the sensed cardiac electrogram signal;
detecting an arrhythmia in response to the cardiac rate;
sensing an intracardiac pressure signal;
generating a parameter corresponding to a frequency content of the pressure signal;
comparing the parameter to predetermined criteria; and
classifying the arrhythmia in response to the comparing, wherein the arrhythmia is classified as a first arrhythmia in response to the parameter meeting the predetermined criteria and as a second arrhythmia in response to the parameter not meeting the predetermined criteria.
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Abstract
A system and method for detecting and classifying cardiac arrhythmias based on cardiac pressure signals or the combination of cardiac electrical and cardiac pressure signals. A cardiac electrogram signal is sensed to derive a cardiac rate from which an arrhythmia detection is made when the cardiac rate meets arrhythmia detection criteria. An intracardiac pressure signal is sensed to derive an indicator of tachycardia based on an analysis of the pressure signal in either the time domain or frequency domain. The detected arrhythmia is classified as tachycardia or fibrillation based on the tachycardia indicator wherein the tachycardia indicator is compared to tachycardia detection criteria and the arrhythmia is classified as tachycardia if tachycardia detection criteria are met and the arrhythmia is classified as fibrillation if the tachycardia detection criteria are not met.
130 Citations
33 Claims
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1. A method for detecting and classifying an arrhythmia, comprising:
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sensing a cardiac electrogram signal;
determining a cardiac rate in response to the sensed cardiac electrogram signal;
detecting an arrhythmia in response to the cardiac rate;
sensing an intracardiac pressure signal;
generating a parameter corresponding to a frequency content of the pressure signal;
comparing the parameter to predetermined criteria; and
classifying the arrhythmia in response to the comparing, wherein the arrhythmia is classified as a first arrhythmia in response to the parameter meeting the predetermined criteria and as a second arrhythmia in response to the parameter not meeting the predetermined criteria. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A medical device, comprising:
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means for sensing a cardiac electrogram signal;
means for determining a cardiac rate in response to the sensed cardiac electrogram signal;
means for detecting an arrhythmia in response to the cardiac rate;
means for sensing an intracardiac pressure signal;
means for generating a parameter corresponding to a frequency content of the pressure signal;
means for comparing the parameter to predetermined criteria; and
means for classifying the arrhythmia in response to the comparing, wherein the arrhythmia is classified as a first arrhythmia in response to the parameter meeting the predetermined criteria and as a second arrhythmia in response to the parameter not meeting the predetermined criteria. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A computer readable medium having computer executable instructions for performing a method comprising:
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sensing a cardiac electrogram signal;
determining a cardiac rate in response to the sensed cardiac electrogram signal;
detecting an arrhythmia in response to the cardiac rate;
sensing an intracardiac pressure signal;
generating a parameter corresponding to a frequency content of the pressure signal;
comparing the parameter to predetermined criteria; and
classifying the arrhythmia in response to the comparing, wherein the arrhythmia is classified as a first arrhythmia in response to the parameter meeting the predetermined criteria and as a second arrhythmia in response to the parameter not meeting the predetermined criteria.
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Specification