PROCARDIO 8 – THE 8th GENERATION OF THE HIGH RESOLUTION ECG MAPPING SYSTEM
J. Muzik, M. Tysler, P. Kneppo, V. Rosik, S. Karas, E. Heblakova
Abstract:
In this paper a real-time data acquisition, visualization and signal processing software and an inverse-problem-solving method enabling non-invasive location of bioelectric sources in the heart are presented. Complete solution also consists of a portable measuring unit connected to a personal computer on which the software is running.
Acquisition and real-time processing and visualization software LiveMap is a client-server software for MS Windows. This modular open source software package provides real-time 2D and 3D visualization of various types of data mapped directly to a human chest model. It can compute isopotential and isointegral surface maps, as well as difference and departure maps applicable for direct heart or brain diagnostics.
For identification of local ischemia of myocardial cells an inverse method implemented in Matlab was included into offline ECG processing. It uses alterations in time integrals of surface potentials connected with changed repolarization of ischemic myocardial cells together with information on torso volume conductor to find an equivalent dipole representing the ischemic lesion.
Although the software can be used with variety of acquisition units, all its advantages can be achieved using a mobile measuring system which was developed in parallel to the software. It enables simultaneous recording of biopotentials measured in up to 128 body surface nodes relatively to a chosen reference potential. Active electrodes and intelligent data acquisition unit powered by a Li-ion cell enable to achieve high quality of measured signals. Connection to the USB port of a host computer over an optical cable minimizes capacitive coupling and guaranties high level of patient safety.
Keywords:
body surface potential mapping, real-time visualization, equivalent dipole model
Download:
IMEKO-WC-2009-TC13-574.pdf
DOI:
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Event details
Event name:
XIX IMEKO World Congress
Title:

Fundamental and Applied Metrology

Place:
Lisbon, PORTUGAL
Time:
06 September 2009 - 11 September 2009
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