Method of destruction of the pathological excitation sources in the heart by original monopolar electrode

Abstract

Purpose. This work is devoted to the study of destruction of the pathological excitation sources in the heart by the original monopolar electrode and the high-frequency electrosurgical generator Erbe VIO-100 S (Germany) in the coagulation mode in order to optimize technology of their using in surgical practice for Maze surgery. Methodology. Experimental study of the effect of electric current on the myocardium were performed in the laboratory on the endocardial part of four remote pig hearts in the cold hibernation state. Temperature evaluation of myocardial contact with the electrode was carried out using mathematical modeling of temperature fields of radio frequency current interaction with the tissue in the program Comsol Multiphysics. Results. Safe and effective destruction size, nature of histological and temperature changes in the interaction region of myocardial tissue with a source of electrical current depending on the duration and power application to stop the spread of pathological excitation sources in the heart were defined. Originality. The recommendations on the choice of the optimal parameters for the application of the generator Erbe and the original monopolar electrode were developed and adapted to radiofrequency ablation of myocardial tissue in the open heart for the arrhythmias treatment in order to reduce the total duration of surgery with cardiopulmonary bypass. Practical value. The results have been introduced in surgical practice of the State Institution «M. M. Amosov National Institute of Cardiovascular Surgery Ukraine NAMS of Ukraine». The work has great practical importance, because the expanding of the functional range of generator Erbe VIO-100 S (Germany) applications and reducing of the cost of radio frequency ablation procedure in comparison with the use of specialized disposable bipolar electrodes.