Method and apparatus for analyzing and editing ECG morphology and time series
First Claim
1. A method for analyzing the characteristics of electrocardiographic (ECG) signal data, the method comprising the steps of:
- obtaining ECG signal data comprising a plurality of waveforms, each waveform comprising a depolarization feature and a repolarization feature;
extracting, with a processor, the depolarization feature from each of the plurality of waveforms;
selecting, with the processor, a set of stable waveforms from the plurality of waveforms based upon a statistical property of the extracted depolarization features;
extracting, with the processor, the repolarization feature from each of the waveforms of the set of stable waveforms;
computing, with the processor, an indication of Torsade de Pointes (TdP) from the extracted repolarization features, andpresenting the indication of TdP on a graphical display.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for analyzing the QT interval characteristics of ECG signal data having a succession of waveforms produced by the beating of the heart. ECG signal data is obtained from a patient. The R-R interval and the QT intervals of the waveforms of the ECG signal data are determined. Waveforms of the ECG signal data having a stable heart rate are selected for use in determining the QT interval characteristics. Preferably, the waveforms selected are those having minimum R-R interval standard deviation and minimum R-R interval dispersion. The QT correction (QTc) is computed from the ECG signal data waveforms selected in the foregoing manner or on the basis of clinician editing. The R-R intervals, the QT intervals, and QTc for the heart beats of the selected waveforms are displayed for analysis and diagnosis purposes. The invention can also be used, in an analogous manner, to obtain and display other cardiac data from the ECG waveforms.
-
Citations
19 Claims
-
1. A method for analyzing the characteristics of electrocardiographic (ECG) signal data, the method comprising the steps of:
-
obtaining ECG signal data comprising a plurality of waveforms, each waveform comprising a depolarization feature and a repolarization feature; extracting, with a processor, the depolarization feature from each of the plurality of waveforms; selecting, with the processor, a set of stable waveforms from the plurality of waveforms based upon a statistical property of the extracted depolarization features; extracting, with the processor, the repolarization feature from each of the waveforms of the set of stable waveforms; computing, with the processor, an indication of Torsade de Pointes (TdP) from the extracted repolarization features, and presenting the indication of TdP on a graphical display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of analyzing the characteristics of electrocardiographic (ECG) signal data, the method comprising the steps of:
-
obtaining ECG signal data comprising a plurality of waveforms, each waveform comprising a depolarization feature and a repolarization feature; extracting, with a processor, the depolarization feature from each of the plurality of waveforms; selecting, with the processor, a set of stable waveforms from the plurality of waveforms based upon a statistical property of the extracted depolarization features; extracting, with the processor, the repolarization feature from each of the waveforms of the set of stable waveforms; computing, with the processor, QT correction (QTc) from the extracted repolarization features, and presenting the QTc on a graphical display. - View Dependent Claims (14, 15, 16, 17, 18, 19)
-
Specification