ABSTRACT
In this article the problem of the construction of the geometrical-conductivity model of a human chest in a computer simulation of the cardiac electrical field, applying image diagnostic data (CT, conventional radiography and 2D projections of a torso) is presented. On the basis of these data parameters are defined which allow the determination of locations and sizes of significant chest organs. Calculations and comparison of the values of these parameters for CT and radiographic data of the example patient, using image processing methods, have been carried out. A numerical experiment has been performed to determine the epicardial maps, applying two geometrical-conductivity models of the individual patient based on CT (accurate) and radiographic (approximate) image data, respectively. The credibility of the results obtained is discussed.
Subject(s)
Computer Simulation , Heart/physiology , Models, Cardiovascular , Action Potentials , Body Surface Potential Mapping , Electric Conductivity , Heart/anatomy & histology , Heart/diagnostic imaging , Humans , Models, Anatomic , Tomography, X-Ray ComputedABSTRACT
In this work the investigations of the electrical field generated by the heart, carried out using a computer simulation method are presented. Two models have been constructed approximating the chest region for the following conditions: (a) normal heart activity, and (b) open chest during the cardiac surgery. For the above models the distribution of potentials on the heart surface are determined. The source field investigated takes the following forms: dipole, multidipole, and multipole. Numerical experiments for these models show a difference between normal heart activity and of the heart in the condition when the chest is open during surgery.
