IMPLANTABLE MEDICAL DEVICE AND A METHOD COMPRISING MEANS FOR DETECTING AND CLASSIFYING VENTRICULAR TACHYARRHYTMIAS (As Amended)
First Claim
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1. An implantable medical device comprising:
- a tachyarrhythmia detector that detects a ventricular tachyarrhythmia in a heart of a subject based on an electrocardiogram signal measured for said heart;
an impedance determining unit that determines a cardiogenic impedance signal representative of volumetric dynamics of at least one ventricle of said heart; and
a tachyarrhythmia classifier that classifies said ventricular tachyarrhythmia as a stable ventricular tachyarrhythmia or an unstable ventricular tachyarrhythmia based on said cardiogenic impedance signal.
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Abstract
In a method and implantable medical device for ventricular tachyarrhythmia detection and classification, upon detection of a ventricular tachyarrhythmia based on an electrocardiogram signal, cardiogenic impedance data representative of ventricular volume dynamics are collected and used for classifying the detected tachyarrhythmia as stable or unstable. In the latter case but typically not in the former case, defibrillation shocks or other forms of therapy are applied to combat the unstable ventricular tachyarrhythmia.
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Citations
32 Claims
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1. An implantable medical device comprising:
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a tachyarrhythmia detector that detects a ventricular tachyarrhythmia in a heart of a subject based on an electrocardiogram signal measured for said heart; an impedance determining unit that determines a cardiogenic impedance signal representative of volumetric dynamics of at least one ventricle of said heart; and a tachyarrhythmia classifier that classifies said ventricular tachyarrhythmia as a stable ventricular tachyarrhythmia or an unstable ventricular tachyarrhythmia based on said cardiogenic impedance signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A heart conditioning method comprising the steps of:
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detecting a ventricular tachyarrhythmia in a heart of a subject based on an electrocardiogram signal measured for said heart; determining a cardiogenic impedance signal representative of volumetric dynamics of at least one ventricle of said heart; and classifying said ventricular tachyarrhythmia as a stable ventricular tachyarrhythmia or an unstable ventricular tachyarrhythmia based on said cardiogenic impedance signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification