Standard 12-Lead ECG Reconstruction from Asynchronous Leads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing single-lead ECG devices struggle to produce a standard 12-lead ECG accurately due to asynchronous lead acquisition, particularly failing to replicate the standard precordial leads V1-V6, which are crucial for reliable cardiac diagnostics.
Innovation Solution
A method and system that utilize two electrodes to sequentially acquire fifteen leads, including three limb leads and twelve chest leads, performing time-alignment and calculations to generate all twelve standard leads, especially the precordial leads V1-V6, by using redundant information from non-standard leads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sequential lead acquisition is used in single-lead ECG devices, then device simplicity and portability are improved, but measurement precision and reliability of standard 12-lead ECG production deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing transformation matrices that map sequential lead measurements to standard 12-lead ECG configurations. Before actual ECG acquisition, the system prepares the mathematical framework (transformation matrices) that will be used to convert the simplified sequential measurements into clinically usable 12-lead format, thereby resolving the precision issue while maintaining device simplicity
Solution Approach 2:
The patent changes parameters by transforming the acquisition mode from simultaneous multi-lead recording to sequential single-lead recording, and compensates by applying mathematical transformations (parameter transformations) to reconstruct the standard 12-lead ECG. This parameter change approach allows the device to maintain simplicity while achieving measurement precision through computational methods
2Device complexity
If sequential lead acquisition is used, then device complexity is reduced, but time alignment accuracy of acquired leads deteriorates
Solution Approach 1:
The patent implements feedback by using the relationship between different limb leads (Einthoven's triangle relationships) to verify and adjust the time alignment of sequentially acquired leads. The system continuously checks whether the measured leads satisfy the expected mathematical relationships and adjusts timing accordingly, ensuring accurate time alignment without requiring complex simultaneous acquisition hardware
Solution Approach 2:
The system performs preliminary time alignment by establishing reference timing relationships before full ECG processing. It uses the known physiological relationships between different leads to pre-synchronize the timing of sequentially acquired leads, ensuring that when the leads are combined to form standard 12-lead ECG, proper time alignment is already in place
3Loss of information
If fifteen sequential leads are acquired, then completeness of ECG data is improved, but acquisition time increases
Solution Approach 1:
The patent merges information by acquiring fifteen sequential leads that contain redundant but complementary information about the heart's electrical activity. By combining these multiple sequential measurements and applying mathematical transformations, the system reconstructs a complete standard 12-lead ECG, ensuring no diagnostic information is lost while managing acquisition time through efficient processing
Data Source
AI summary
A method and a system are disclosed for producing a standard 12-lead ECG formed by three standard limb leads I, II, III, three standard augmented limb leads aVR, aVL, aVF, and six standard precordial leads V1 to V6, from fifteen asynchronous leads, sequentially acquired by a single-lead electronic device having two electrodes only. The sequentially acquired leads include three acquired limb leads I, II, and III, and twelve acquired arm-referenced chest leads CR1-CR6 and CL1-CL6. Each pair of acquired leads CRi and CLi of acquired leads CR1-CR6 and CL1-CL6 represent voltage differences acquired between a right arm and a left arm, respectively, and a common chest position Ci associated with a corresponding standard precordial lead Vi.