System and method for analyzing complex curvature of ECG curves
First Claim
1. System for analysis of ECG curvature comprising a computer system, which computer system performs a mathematical analysis, which mathematical analysis comprises at least the following steps:
- a;
the system comprises input means connected to at least one ECG source,b;
a number of different parameters are isolated and stored in the computer system,c;
the computer system select a first number of parameters from at least one main group,d;
the computer system combine the selected parameters in at least a first mathematical analysis, whereby the parameters are selected from groups of symmetry (S1-S72), flatness (F1-F91), duration (D1-D47) and/or complexity (C1-C468),e;
extract a segment in of the ECG curvature in the mathematical analysis,f;
which segment is corresponding to a interval between defined electrocardiographic points,g;
which segment is used as input to a first algorithm,h;
where a second fiducial point algorithm automatically calculates fiducial points at the segment,i;
where concavity intervals are evaluated on subsegments of the ECG segment and form the basis of up- and downwards concavity quantification,j;
where the system based on at least the first and the second algorithm detects and quantifies concavity on ECG curvatures;
wherein at least one segment of the ECG repolarization signal is selected, corresponding to the interval between the Twave onset and Twave offset, which segment is normalized so that the amplitude range (y) is equal to a first predefined value in the selected interval.
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Abstract
A system and a method for analysis of ECG curvature, which system involves a mathematical analysis comprising the following features where a number of different parameters are isolated and stored in a computer, where a first number of parameters are selected from at least one main group, where the selected parameters are combined in at least a first mathematical analysis. It is the object of the invention to improve mathematical analysis of ECG curvature particular for complex parts of the curvature such as notches or concavities. This can be achieved by selecting parameters from groups of symmetry, flatness, duration and/or complexity, using the parameters as input to an algorithm, where concavity intervals are evaluated on subsegments of the ECG segment and form the basis of up and downwards concavity quantification, where the system based on an algorithm detects and quantifies concavity on ECG curvatures.
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Citations
19 Claims
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1. System for analysis of ECG curvature comprising a computer system, which computer system performs a mathematical analysis, which mathematical analysis comprises at least the following steps:
-
a;
the system comprises input means connected to at least one ECG source,b;
a number of different parameters are isolated and stored in the computer system,c;
the computer system select a first number of parameters from at least one main group,d;
the computer system combine the selected parameters in at least a first mathematical analysis, whereby the parameters are selected from groups of symmetry (S1-S72), flatness (F1-F91), duration (D1-D47) and/or complexity (C1-C468),e;
extract a segment in of the ECG curvature in the mathematical analysis,f;
which segment is corresponding to a interval between defined electrocardiographic points,g;
which segment is used as input to a first algorithm,h;
where a second fiducial point algorithm automatically calculates fiducial points at the segment,i;
where concavity intervals are evaluated on subsegments of the ECG segment and form the basis of up- and downwards concavity quantification,j;
where the system based on at least the first and the second algorithm detects and quantifies concavity on ECG curvatures;wherein at least one segment of the ECG repolarization signal is selected, corresponding to the interval between the Twave onset and Twave offset, which segment is normalized so that the amplitude range (y) is equal to a first predefined value in the selected interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification