Implantable cardiac stimulation device and method that discriminates between and treats atrial tachycardia and atrial fibrillation
First Claim
1. An implantable cardiac stimulation device that treats accelerated arrhythmias of atria of a patient'"'"'s heart, the device comprising:
- a sensing circuit that senses cardiac activity of one of the patient'"'"'s atria to provide an atrial activity signal;
a detector that detects an accelerated atrial arrhythmia of the patient'"'"'s heart;
a classifying circuit that measures relative correspondence between a plurality of pairs of successive P waves of the atrial activity signal to classify the detected accelerated atrial arrhythmia as either atrial tachycardia or atrial fibrillation; and
a therapy circuit that applies a first therapy to the heart responsive to a classified atrial tachycardia and a second therapy to the heart responsive to a classified atrial fibrillation;
wherein the relative correspondence is determined by an auto-power spectra computed as a discrete-time cosine transform.
1 Assignment
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Accused Products
Abstract
An implantable cardiac stimulation device discriminates and treats accelerated atrial arrhythmias of a patient'"'"'s heart. The device includes a sensing circuit that senses cardiac activity of one of the patient'"'"'s atria to provide an atrial activity signal, a detector that detects an accelerated atrial arrhythmia of the patient'"'"'s heart, and a classifying circuit that measures relative correspondence between successive P waves of the atrial activity signal to classify the detected accelerated atrial arrhythmia as either atrial tachycardia or atrial fibrillation. A therapy circuit provides anti-tachycardia pacing therapy responsive to a classified atrial tachycardia and defibrillation therapy responsive to a classified atrial fibrillation.
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Citations
40 Claims
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1. An implantable cardiac stimulation device that treats accelerated arrhythmias of atria of a patient'"'"'s heart, the device comprising:
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a sensing circuit that senses cardiac activity of one of the patient'"'"'s atria to provide an atrial activity signal; a detector that detects an accelerated atrial arrhythmia of the patient'"'"'s heart; a classifying circuit that measures relative correspondence between a plurality of pairs of successive P waves of the atrial activity signal to classify the detected accelerated atrial arrhythmia as either atrial tachycardia or atrial fibrillation; and a therapy circuit that applies a first therapy to the heart responsive to a classified atrial tachycardia and a second therapy to the heart responsive to a classified atrial fibrillation; wherein the relative correspondence is determined by an auto-power spectra computed as a discrete-time cosine transform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36)
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12. An implantable cardiac stimulation device that treats accelerated atrial arrhythmias of a patients heart, the device comprising:
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a sensing circuit that senses cardiac activity of one of the patients atria to provide an atrial activity signal; a detector that detects an accelerated atrial arrhythmia of the patients heart; a classifying circuit that measures coherence between a plurality of pairs of successive P waves of the atrial activity signal to classify the detected accelerated atrial arrhythmia as either atrial tachycardia or atrial fibrillation; and a therapy circuit that applies anti-tachycardia pacing to the heart responsive to a classified atrial tachycardia and defibrillation to the heart responsive to a classified atrial fibrillation; wherein the coherence is determined by an auto-power spectra computed as a discrete-time cosine transform. - View Dependent Claims (37)
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13. An implantable cardiac stimulation device that treats atrial tachyarrhythmias of a patient'"'"'s heart, the device comprising:
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a sensing circuit that senses cardiac activity of the patient'"'"'s right atria to provide an atrial activity signal; a detector that detects an atrial tachyarrhythmia of the patient'"'"'s heart; a classifying circuit that measures a maximum coherence between a plurality of pairs of successive P waves of the atrial activity signal to classify the detected atrial tachyarrhythmia as either atrial tachycardia or atrial fibrillation; a pacing circuit that applies anti-tachycardia pacing to the patients heart responsive to a classified atrial tachycardia; and a shocking circuit that applies a defibrillation shock to the patient'"'"'s atria responsive to a classified atrial fibrillation; wherein the maximum coherence is determined by an auto-power spectra computed as a discrete-time cosine transform. - View Dependent Claims (38)
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14. An implantable cardiac stimulation device that treats accelerated atrial arrhythmias of a patient'"'"'s heart, the device comprising:
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sensing means for sensing cardiac activity of one of the patient'"'"'s atria to provide an atrial activity signal; detecting means for detecting an accelerated atrial arrhythmia of the patients heart; classifying means for measuring relative correspondence between a plurality of pairs of successive P waves of the atrial activity signal to classify the detected accelerated atrial arrhythmia as either atrial tachycardia or atrial fibrillation; and therapy means for applying to the heart a first therapy responsive to a classified atrial tachycardia and a second therapy responsive to a classified atrial fibrillation; wherein the relative correspondence is determined by an auto-power spectra computed as a discrete-time cosine transform. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 39)
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25. In an implantable cardiac stimulation device, a method of treating accelerated atrial arrhythmias of a patient'"'"'s heart, the method comprising:
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sensing cardiac activity of one of the patient'"'"'s atria to provide an atrial activity signal; detecting an accelerated atrial arrhythmia of the patient'"'"'s heart; measuring relative correspondence between a plurality of pairs of successive P waves of the accelerated atrial arrhythmia; classifying the detected accelerated atrial arrhythmia as either atrial tachycardia or atrial fibrillation responsive to the relative correspondence measure; and applying a first therapy to the heart responsive to a classified atrial tachycardia and a second therapy to the heart responsive to a classified atrial fibrillation; wherein the relative correspondence is determined by an auto-power spectra computed as a discrete-time cosine transform. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 40)
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Specification