Multidimensional Cardiac Activity Analysis Device
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Solution Overview
Problem
Current devices lack the capability to simultaneously perform vectorcardiography and three-dimensional cardiac impedance measurements, and none can assess the relationship between cardiac contraction time course and stimulation, requiring expensive equipment and trained personnel, while existing solutions focus on hemodynamic parameters rather than the dynamics of cardiac tissue motion.
Innovation Solution
A method and device for simultaneous three-dimensional ECG and impedance rheometry measurements using different frequencies on three orthogonal axes, combined with tissue motion sensors outside the body, allowing for non-invasive assessment of cardiac activity and differentiation of heart diseases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If expensive equipment such as echocardiography, magnetic resonance, or computer tomography is used to observe cardiac contraction time course, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent combines vectorcardiography and three-dimensional impedance rheometry measurements into a single integrated device, allowing simultaneous acquisition of multiple cardiac parameters without requiring separate expensive imaging equipment. This merging approach maintains measurement precision while reducing device complexity and cost.
Solution Approach 2:
The device performs multiple functions including vectorcardiography, three-dimensional impedance rheometry, and tissue motion sensing within a single system. This multi-functionality eliminates the need for multiple specialized devices, thereby reducing overall complexity and cost while maintaining comprehensive cardiac assessment capabilities.
2Measurement precision
If separate devices are used for vectorcardiography and three-dimensional impedance rheometry, then measurement precision for each parameter is maintained, but device complexity and operational complexity increase
Solution Approach 1:
The patent integrates vectorcardiography and three-dimensional impedance rheometry measurement systems into a single device with unified control and processing. This integration allows both measurement types to be performed simultaneously through a single operational interface, maintaining precision while greatly simplifying operation compared to using separate devices.
3Device complexity
If classical electrocardiography with resistance measurement only is used, then device complexity is reduced, but measurement precision of cardiac activity changes is insufficient
Solution Approach 1:
The patent extends classical electrocardiography by measuring both real and imaginary parts of impedance across three orthogonal axes, rather than only resistance. This parameter expansion provides more comprehensive cardiac activity information, improving measurement precision while maintaining relative system simplicity through the use of standard electrode configurations.
4Difficulty of detecting and measuring
If frequency analysis methods are used for vibro-acoustic detection, then analysis capability is improved, but applicability is limited due to the nonlinear nature of cardiac dynamics
Solution Approach 1:
The patent replaces frequency analysis methods with time-domain analysis of impedance and voltage changes. This substitution allows direct observation of cardiac dynamics without requiring linearity assumptions, making the method applicable to the inherently nonlinear cardiac system while maintaining strong signal analysis capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables advanced, non-invasive, and automated diagnostics of heart diseases by providing a multidimensional analysis of cardiac activity, differentiating heart motion modes and assessing energy generated by the heart, beyond hemodynamic parameters, with high efficiency in distinguishing healthy and diseased patients.
Implementation Method 1
The invention relates to a method for measuring multidimensional dynamics of cardiac activity comprising simultaneous measurement of three dimensional ECG and three dimensional impedance rheometry
Implementation Method 2
the impedance rheometry measurement comprises simultaneous generation of applied current of different frequencies for three orthogonal axes and an impedance measurement for the same or other three orthogonal axes
Implementation Method 3
US20110295127A discloses a device and method for vibro-acoustic detection of cardiac arrhythmia. Measurements of vibrations are performed and based on the frequency and amplitude changes it is possible to determine if and which disturbances occur
Implementation Method 4
The dynamics of cardiac activity is nonlinear because of many independent systems of cardiac rhythm regulation
Data Source
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AI summary
The invention relates to a method for measuring multidimensional dynamics of cardiac activity comprising simultaneous measurement of: three dimensional ECG, three dimensional impedance rheometry, tissue motion, wherein the tissue motion measurement is performed with a sensor placed outside the patient body selected from among sensors including: membrane, auscultation funnel, accelerometer, microphone, piezoelectric sensor, wherein the impedance rheometry measurement comprises simultaneous generation of applied current of different frequencies for three orthogonal axes and an impedance measurement for the same or other three orthogonal axes, and wherein the impedance rheometry measurement and the ECG measurement are carried out for the same three orthogonal axes. The invention further relates to a device for implementation of the method.