Multidimensional Cardiac Analysis Device Using Orthogonal ECG and Impedance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current devices lack the capability to simultaneously measure the time course of cardiac contraction and its stimulation, and there is no device that performs vectorcardiography and three-dimensional cardiac impedance measurements, which are essential for comprehensive cardiac activity analysis, especially in non-invasive and affordable ways.
Innovation Solution
A method and device for multidimensional analysis of cardiac activity that combines simultaneous three-dimensional ECG and impedance rheometry measurements, using electrodes on three orthogonal axes with different current frequencies, along with tissue motion sensors for non-invasive monitoring of cardiac tissue dynamics, allowing for the assessment of energy and work related to myocardium activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If echocardiography, magnetic resonance, computer tomography, or nuclear medicine methods are used to observe contraction time course, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent combines ECG measurements with impedance rheometry measurements into a single integrated system. The ECG electrodes serve dual purposes: detecting electrical cardiac activity and measuring impedance changes. This merging of functions allows simultaneous acquisition of contraction timing and mechanical activity data without requiring separate expensive imaging equipment like echocardiography or MRI machines.
Solution Approach 2:
The measurement system is designed to perform multiple functions using the same hardware components. The electrodes placed on the patient's body serve both as ECG sensors for electrical activity detection and as impedance measurement points for mechanical activity assessment. This multi-functionality eliminates the need for specialized equipment for each measurement type, reducing overall system complexity and cost.
2Measurement precision
If vectorcardiography and three-dimensional cardiac impedance measurements are performed simultaneously, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The measurement system is divided into three orthogonal measurement axes (X, Y, Z), each with its own pair of electrodes. This segmentation into independent orthogonal components allows the system to capture three-dimensional cardiac activity separately along each axis, which can then be synthesized to provide comprehensive spatial information about cardiac function without requiring a single complex three-dimensional sensor array.
3Device complexity
If classical electrocardiography with impedance measurement is used for navigation during heart ablation, then device complexity is reduced, but measurement precision is insufficient because only resistance is measured and heart rate synchronous averaging is required
Solution Approach 1:
The patent applies periodic current at different frequencies through the impedance measurement system. By using alternating current at multiple frequencies rather than direct current, the system can differentiate between resistive and reactive components of tissue impedance. This periodic action enables real-time measurement of both resistance and reactance without requiring signal averaging, providing more precise cardiac activity data while maintaining system simplicity.
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 holistic view of cardiac motion and energy dynamics, differentiating healthy from diseased states with high efficiency, potentially available in every clinic.
Implementation Method 1
The measurement applies to tissues that move in the chest, such as contractile tissues (muscles) and those that are moved by the contractile tissues
Implementation Method 2
the impedance rheometry measurement comprises simultaneous generation of applied current of different frequencies for three orthogonal axes
Data Source
AI summary
The present disclosure relates to a method for measuring multidimensional dynamics of cardiac activity comprising simultaneous measurement ofthree 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 includes simultaneous generation of applied current of different frequencies for three orthogonal axes and an impedance measurement for the same or other three orthogonal axes, andwherein the impedance rheometry measurement and the ECG measurement are carried out for the same three orthogonal axes.The present disclosure further relates to a device for implementation of the method.