Application of 3В-modelling and visualization in the analysis of cardiac electrical activity, taking into account individual parameters of ECG leads

During short-term changes of geographical regions and under conditions of climatic changes, a person undergoes climatic adaptation. Its important factor is the normalization of cardiac activity. To monitor this process, periodic objective control of heart function is necessary. Electrocardiography is a proven tool for such monitoring. Its results are used to get an idea of the electrical activity of the heart. One of the models of electrical activity allows to find the values of dipole moments - electrical characteristics of the heart surface areas – using the known potential at a point on the body surface (branch) and geometrical characteristics of the patient's chest model. The electric field of a dipole propagates through different tissues of internal organs, which have different electrical resistance. For a more accurate determination of the electrical characteristics of the heart, it is necessary to represent the resistance of the body between the dipole and the lead by the sum of tissue resistances. For this objective, it is necessary to know the geometric dimensions of tissue sections of a real patient. A patient-adjustable three- dimensional computer model of the chest and its organs, including the heart, is proposed. The path between the lead and the dipole is modelled by a spatial vector of the lead, the coordinates of the intersection points of which with the thoracic organs are registered. From the obtained coordinates, the sizes of sections of different tissues are calculated. Blender development, rendering and animation environment, Microsoft Visual Studio 2022 software development environment, Unity 2021.3.11f1 visualizer were used for modelling and computation. The testing showed a satisfactory match between the simulation results and the test parameter data. The obtained results can serve as a basis for the creation of modern methods and means of personalized diagnostics of the heart condition, both in conditions of climatic adaptation and in other conditions.