ECG to Heart Model TSI Path Localization
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Solution Overview
Problem
Existing methods for obtaining a vector cardiogram (VCG) from ECG signals lack direct physical relevance to the heart's anatomy, requiring extensive experience to interpret and often fail to accurately represent the activation of the myocardium, especially in diagnosing ventricular arrhythmias.
Innovation Solution
A method to derive a mean temporal spatial isochrone (TSI) path from ECG measurements, using ECG recording devices, which involves determining VCG data, positioning electrodes relative to a heart model, and calculating TSI data to accurately represent the activation of the heart within the torso, thereby providing a physically relevant graphical representation for interpretation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a vector cardiogram (VCG) is obtained from ECG signals using conventional methods, then the activation direction of the heart can be represented, but the representation lacks direct physical relevance to the heart's anatomy and requires extensive experience to interpret
Solution Approach 1:
The patent introduces an anatomical heart model as an intermediary between the ECG signals and their interpretation. The VCG data is projected onto this model to create visual representations that directly correspond to anatomical structures, making the abstract electrical activity interpretable in terms of physical heart anatomy without requiring extensive expert experience
Solution Approach 2:
The patent creates visual copies of the VCG data projected onto anatomical models of the heart. These graphical representations (isochrones, activation maps) are copies that preserve the electrical activation information while presenting it in a format that directly reflects the physical anatomy, enabling intuitive interpretation
2Measurement precision
If conventional VCG methods are used to represent heart activation, then the electrical activity can be visualized, but the accuracy in representing actual myocardial activation is insufficient
Solution Approach 1:
The patent transitions from conventional two-dimensional VCG representations to three-dimensional visualizations projected onto anatomical heart models. This dimensional enhancement allows the VCG data to be displayed in a spatial context that matches the actual three-dimensional structure of the heart, significantly improving the accuracy of myocardial activation representation
Solution Approach 2:
The patent changes the parameter space by projecting VCG vectors onto anatomical coordinates defined by the heart model. This transformation from abstract vector space to anatomical coordinate space enables direct correlation between measured electrical activity and physical locations in the myocardium, enhancing measurement precision
3Measurement precision
If ECG features are analyzed without anatomical reference, then processing is simpler, but localization of ECG features within the heart is imprecise
Solution Approach 1:
The patent performs preliminary positioning of ECG electrodes on the anatomical heart model before analyzing the ECG features. This pre-establishment of anatomical reference points and coordinate systems enables subsequent precise localization of activation features without requiring complex real-time calculations during feature analysis
Data Source
AI summary
The present invention relates to a method to provide a mean temporal spatial isochrone (TSI) path relating to an ECG feature (wave form) of interest, such as the activation of the heart from a single point (QRS), relative to the heart in a torso while using an ECG measurement from an ECG recording device. The method includes: receiving ECG measuring data from the ECG recording device; determining vector cardiogram (VCG) data; receiving a model of the heart, preferably with torso, as an input, preferably based on a request including request parameters; determining mean TSI data values representing the TSI path relating to an electrophysiological phase representing the ECG feature, the mean TSI providing a location within the heart representing the mean location of the ECG feature at the corresponding time; positioning the mean TSI path and preferably the vector cardiogram data points in the model of the heart and/or torso at an initial position; and rendering the model of the heart, preferably with torso, with the mean TSI path, preferably with VCG data related to the TSI, for displaying on a display screen for interpretation of the displayed rendering.