Handheld Orthogonal ECG Configuration for Simplified AMI Detection
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Solution Overview
Problem
Existing cardiac monitoring devices require complex procedures, multiple electrodes, and trained personnel for accurate AMI diagnosis, often leading to misinterpretation and high operational costs, and existing 3-lead systems lack sufficient diagnostic information due to non-orthogonal lead configurations.
Innovation Solution
A handheld device with an asymmetric electrode configuration, including four electrodes arranged on two or more surfaces to provide orthogonal leads, allowing automated AMI detection without the need for 12-lead reconstruction, using a central point or resistive network to achieve high orthogonality and stable electrical contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single lead or few leads are used for ECG recording, then the device complexity is reduced and ease of operation is improved, but the measurement precision and reliability of AMI detection deteriorate
Solution Approach 1:
The patent applies asymmetry by using an asymmetric electrode configuration where one electrode is positioned at a specific location (e.g., V4 position) on the chest while the other three electrodes are placed on the hands. This asymmetric arrangement creates orthogonal leads that capture diagnostic information equivalent to multiple standard leads, resolving the contradiction between simple device operation and accurate AMI detection
Solution Approach 2:
The patent transitions from conventional coplanar lead arrangements to a three-dimensional orthogonal configuration by placing electrodes on both the chest and hands. This dimensional change allows four electrodes to generate multiple orthogonal leads (I, II, III, aVR, aVL, aVF, and precordial leads) that provide comprehensive cardiac coverage equivalent to 12-lead ECG, thereby improving measurement precision without increasing device complexity
2Measurement precision
If 12-lead ECG is used for comprehensive cardiac diagnostics, then the measurement precision and diagnostic information are improved, but the ease of operation and device complexity worsen due to complicated electrode placement
Solution Approach 1:
The patent uses asymmetric electrode positioning where one electrode is placed at a specific cardiac projection point (e.g., V4 position) on the chest, while the other three electrodes are placed on the hands. This asymmetric configuration enables the system to capture diagnostic information from multiple cardiac vectors using fewer electrodes, achieving 12-lead equivalent diagnostic accuracy with simplified placement procedure
Solution Approach 2:
The patent extracts the essential diagnostic information needed for AMI detection by selectively positioning electrodes at critical locations (one on chest at V4 position, three on hands). This extraction approach captures the most diagnostically valuable cardiac vectors while eliminating the need for complex 12-electrode placement, thereby maintaining measurement precision while improving ease of operation
3Ease of manufacture
If symmetric electrode configuration is used, then the manufacturing precision is simplified, but the measurement precision deteriorates due to insufficient orthogonality of leads
Solution Approach 1:
The patent deliberately employs asymmetric electrode configuration to achieve orthogonal leads. By positioning one electrode at a specific cardiac projection point on the chest and the other three on the hands, the system creates spatially orthogonal measurement vectors that are essential for accurate ECG interpretation and AMI detection, resolving the contradiction between manufacturing simplicity and measurement precision
4Measurement precision
If manual ECG interpretation by medical personnel is used, then the measurement precision and diagnostic accuracy are improved, but the productivity and operational cost worsen
Solution Approach 1:
The patent implements automated ECG analysis algorithms that process the orthogonal leads and automatically detect AMI, eliminating the need for manual interpretation by medical personnel. The system performs self-diagnosis by analyzing the electrical patterns in the orthogonal leads, thereby maintaining high diagnostic accuracy while dramatically improving productivity and reducing operational costs through autonomous operation
Data Source
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AI summary
Methods and apparatuses, including devices and systems, for remote and detection and/or diagnosis of acute myocardial infarction (AMI). In particular, described herein are handheld devices having an electrode configuration capable of recording three orthogonal ECG lead signals in an orientation-specific manner, and transmitting these signals to a processor. The processor may be remote or local, and it may automatically or semi-automatically detect AMI, atrial fibrillation or other heart disorders based on the analyses of the deviation of the recorded 3 cardiac signals with respect to previously stored baseline recordings.