Bayesian discriminator for rapidly detecting arrhythmias
First Claim
1. A method for detecting a sinus rhythm of interest with aid of a computer executable instructions processing device based on electrophysiological information obtained from a subject via sensors coupled to the subject, comprising the steps of:
- inputting a training data set as open-test data set of intra-atrial electrograms for evaluation, and receiving a result in accordance with a set of estimated conditional probabilities of the sinus rhythm and a plurality of features.
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Abstract
A method for accurate and rapid automated detection of atrial fibrillation (AF), sinus rhythm (SF), and atrial flutter (AFL) is disclosed, which allows distinguishing of these cardiac signals with lowered risk of errors by implanted pacemakers and like devices. The method includes training episodes of intra-cardiac signals (called the closed data set CDS) to evaluate five feature parameters with a discriminator classifying the signal into AF, AFL or sinus rhythm (SR). Comparison with the independent decisions of experienced physicians for each episode reveals specificity, accuracy and sensitivity of greater than 97%. Each episode is a window of intracardiac signal of interval 1-2 seconds with the discriminator providing results in less than 0.25 s. In another aspect, the method is resistant to the presence of noise in the data. In yet another aspect, more feature parameters may be used in alternative implementations including for detecting signals other than AF, AFL & SR.
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Citations
23 Claims
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1. A method for detecting a sinus rhythm of interest with aid of a computer executable instructions processing device based on electrophysiological information obtained from a subject via sensors coupled to the subject, comprising the steps of:
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inputting a training data set as open-test data set of intra-atrial electrograms for evaluation, and receiving a result in accordance with a set of estimated conditional probabilities of the sinus rhythm and a plurality of features. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for providing an electrical signal in response to detecting a predetermined sinus rhythm with the aid of a set of computer executable instructions based on electrophysiological information obtained from sensors, for example, the device may comprise:
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a set of power input terminals;
a data module for providing conditional probabilities of the predetermined sinus rhythm relative to a plurality of features;
an input for receiving electrophysiological information;
a member for providing the electrical signal for a modulating effect on heartbeats; and
at least one computer executable instructions processing unit. - View Dependent Claims (11, 12, 13, 14)
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15. A computer readable media carrying thereon computer executable instructions for carrying out the steps of a method for detecting a sinus rhythm of interest based on electrophysiological information obtained from a subject via sensors coupled to the subject, the method comprising the steps of:
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inputting an open-test data set of intra-atrial electrograms for evaluation, and receiving a result in accordance with a set of estimated conditional probabilities of the sinus rhythm and a plurality of features. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification