Method and apparatus for ectopic beat detection
First Claim
1. A heart monitor for detecting ectopic beats in an electrocardiogram signal comprising:
- an implantable device configured to monitor an electrocardiogram signal subcutaneously;
an electrocardiogram signal input coupled with said implantable device and configured to obtain said electrocardiogram signal;
a first signal analyzer connected to said electrocardiogram signal input, said first signal analyzer configured to generate a first time series of values that represent each duration of a respective measured RR interval derived from said electrocardiogram signal;
a second signal analyzer configured to generate a modified time series of values that represent a trend of values of said first time series through application of one or more morphological operators comprising an erosion operator or a dilation operator or any combination thereof and to remove abnormal RR intervals from said first time series of values that represent each duration of the respective measured RR-interval, to thus derive the modified time series of RR-intervals that represent a trend of RR intervals; and
,a comparison stage configured to compare said first time series with said modified time series and thusdetect ectopic beats from said modified time series generated with a first discrete kernel function of a first length ordetect non-sustained ventricular tachycardia from said modified time series generated with a second discrete kernel function of a second length wherein said second length is greater than said first length ordetect both ectopic beats from said modified time series generated with said first discrete kernel function of said first length and non-sustained ventricular tachycardia from said modified time series generated with said second discrete kernel function of said second length wherein said second length is greater than said first length.
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Abstract
Heart monitor for detecting ectopic beats in an input electrocardiogram signal that includes an electrocardiogram signal input and a morphological signal analyzer connected to the electrocardiogram signal input, the analyzer being adapted to generate a first time series of values representing the input electrocardiogram signal, a second signal analyzer adapted to generate generating a modified time series of values representing a trend of values of the first time series and a comparison stage being adapted to compare the first time series with the modified time series to thus detect ectopic beats. The invention further relates to a method for detecting ectopic beats in an input electrocardiogram signal that includes obtaining an electrocardiogram signal, generating from the electrocardiogram signal a first time series of values representing the input electrocardiogram signal, generating a modified time series of values representing a trend of values of the first time series and comparing the first time series with the modified time series to thus detect ectopic beats.
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Citations
19 Claims
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1. A heart monitor for detecting ectopic beats in an electrocardiogram signal comprising:
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an implantable device configured to monitor an electrocardiogram signal subcutaneously; an electrocardiogram signal input coupled with said implantable device and configured to obtain said electrocardiogram signal; a first signal analyzer connected to said electrocardiogram signal input, said first signal analyzer configured to generate a first time series of values that represent each duration of a respective measured RR interval derived from said electrocardiogram signal; a second signal analyzer configured to generate a modified time series of values that represent a trend of values of said first time series through application of one or more morphological operators comprising an erosion operator or a dilation operator or any combination thereof and to remove abnormal RR intervals from said first time series of values that represent each duration of the respective measured RR-interval, to thus derive the modified time series of RR-intervals that represent a trend of RR intervals; and
,a comparison stage configured to compare said first time series with said modified time series and thus detect ectopic beats from said modified time series generated with a first discrete kernel function of a first length or detect non-sustained ventricular tachycardia from said modified time series generated with a second discrete kernel function of a second length wherein said second length is greater than said first length or detect both ectopic beats from said modified time series generated with said first discrete kernel function of said first length and non-sustained ventricular tachycardia from said modified time series generated with said second discrete kernel function of said second length wherein said second length is greater than said first length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for detecting ectopic beats in an electrocardiogram signal comprising:
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obtaining an electrocardiogram signal with an implantable device that is monitoring an electrocardiogram signal subcutaneously with an electrocardiogram signal input; generating from said electrocardiogram signal a first time series of values that represent each duration of a respective measured RR interval derived from said input electrocardiogram signal via a first signal analyzer; generating a modified time series of values that represent a trend of values of said first time series by applying one or more morphological operators comprising an erosion operator or a dilation operator or any combination thereof and to remove abnormal RR intervals from said first time series of values that represent each duration of the respective measured RR-interval, to thus derive the modified time series of RR-intervals that represent a trend of RR intervals via a second signal analyzer; and
,comparing said first time series with said modified time series via a comparison stage and thus detecting ectopic beats from said modified time series generated with a first discrete kernel function of a first length or detecting non-sustained ventricular tachycardia from said modified time series generated with a second discrete kernel function of a second length wherein said second length is greater than said first length or detecting both ectopic beats from said modified time series generated with said first discrete kernel function of said first length and non-sustained ventricular tachycardia from said modified time series generated with said second discrete kernel function of said second length wherein said second length is greater than said first length. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification