IMPLANTABLE MEDICAL DEVICE AND METHOD FOR CLASSIFYING ARRHYTHMIA EVENTS
First Claim
1. An implantable medical device for classifying arrhythmia events being connectable to at least one medical lead adapted to be placed at or within a heart of a patient, said medical lead including at least one electrode adapted to sense electrical activity of said heart and to produce at least one signal representative of said electrical activity, said medical device comprising:
- an IEGM analyzing circuit that receives said signal representative of said electrical activity and to analyse IEGMs of said heart to detect an arrhythmia event;
a sensing circuit that senses a respiratory pattern of said patient and to produce at least one signal representative of said respiratory pattern;
a respiratory parameter determining circuit that determines at least one respiratory parameter reflecting characteristics of the respiratory pattern of said patient based on said sensed respiratory pattern and that determines a respiratory measure corresponding to a change of a rate of change of said at least one respiratory parameter; and
an arrhythmia classifying circuit that classifies the detected arrhythmia event based on said respiratory measure, including classifying arrhythmia events that satisfy at least a first criterion as an arrhythmia event requiring therapy.
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Abstract
In an implantable medical device such as an implantable cardiac defibrillator, and a method for classifying arrhythmia events, IEGM signals are analyzed to detect an arrhythmia event and a respiratory pattern of the patient is sensed. At least one respiratory parameter reflecting characteristics of the respiratory pattern of the patient is determined based on the sensed respiratory pattern and a respiratory measure corresponding to a change of a rate of change of the at least one respiratory parameter is calculated. The detected arrhythmia event is classified based on the respiratory measure and the IEGM signals, wherein arrhythmia events that satisfy at least a first criterion is classified as an arrhythmia event requiring therapy.
30 Citations
14 Claims
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1. An implantable medical device for classifying arrhythmia events being connectable to at least one medical lead adapted to be placed at or within a heart of a patient, said medical lead including at least one electrode adapted to sense electrical activity of said heart and to produce at least one signal representative of said electrical activity, said medical device comprising:
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an IEGM analyzing circuit that receives said signal representative of said electrical activity and to analyse IEGMs of said heart to detect an arrhythmia event; a sensing circuit that senses a respiratory pattern of said patient and to produce at least one signal representative of said respiratory pattern; a respiratory parameter determining circuit that determines at least one respiratory parameter reflecting characteristics of the respiratory pattern of said patient based on said sensed respiratory pattern and that determines a respiratory measure corresponding to a change of a rate of change of said at least one respiratory parameter; and an arrhythmia classifying circuit that classifies the detected arrhythmia event based on said respiratory measure, including classifying arrhythmia events that satisfy at least a first criterion as an arrhythmia event requiring therapy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 13)
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8. A method for classifying arrhythmia events in an implantable medical device being connectable to at least one medical lead adapted to be placed at or within a heart of a patient, said medical lead including at least one electrode adapted to sense electrical activity of said heart and to produce at least one signal representative of said electrical activity, wherein said method comprising the steps of:
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analyzing IEGMs of said heart to detect an arrhythmia event; sensing a respiratory pattern of said patient producing at least one signal representative of said respiratory pattern; determining at least one respiratory parameter reflecting characteristics of the respiratory pattern of said patient based on said sensed respiratory pattern; determining a respiratory measure corresponding to a change of a rate of change of said at least one respiratory parameter; and classifying the detected arrhythmia event based on said respiratory measure, wherein arrhythmia events that satisfy at least a first criterion is classified as an arrhythmia event requiring therapy. - View Dependent Claims (9, 10, 11, 12, 14)
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Specification