Evaluation of current density on the surface of the left atrium during TAS

• Autorzy: Prochaczek F. , Galecka J. , Sikora M. , Glasek J.
• Języki publikacji: EN

Abstrakty

EN

Conditions for the indirect transesophageal atrial stimulation (TAS), useful for cardiac diagnosis and treatment, are optimized both by way of clinical experiment and a computer modelling. The paper demonstrates the results of comparison of electric current density, obtained on the surface of the left atrium during computer modelling, with the results of our own experiments. An evaluation was made with the use of spiral CT scanning of the distance between the esophagus and the posterior wall of the left atrium. The average distance in the tested group of 27 subjects was 4.7 ±σ = 1.1 mm. During transesophageal stimulation, we have determined the average excitation threshold of the left atrium, obtaining the value 5.5 ±σ = 1.8 mA in the examined group of 27 patients. The calculated average current density on the surface of left atrium for the selective electrode with point poles used in the experiment amounted to 39.6 μA/mm2. Electric current densities obtained by other researchers by means of computer modelling for omnidirectional and selective ring electrodes turned out to be much lower after adjustment to similar conditions, which was the result of electrically active larger sizes surfaces of the poles of electrodes used in the modelling.

Słowa kluczowe

EN

transesophageal atrial stimulation; TAS; current density; atrial pacing threshold; selective electrodes; omnidirectional electrodes

PL

przezprzełykowa stymulacja przedsionków; TAS; wartość progowa stymulacji przedsionkowej; elektrody selektywne; elektrody dookólne

• Wydawca: University of Silesia, Institute of Informatics, Computer Systems Department
• Czasopismo: Journal of Medical Informatics & Technologies
• Rocznik: 2013
• Tom: Vol. 22
• Strony: 243--249
• Opis fizyczny: Bibliogr. 14 poz., rys., tab.

Twórcy

autor

Prochaczek F.

• Institute of Medical Technology and Equipment ITAM, Roosevelta 118 Street, 41-800 Zabrze.

autor

Galecka J.

• Institute of Medical Technology and Equipment ITAM, Roosevelta 118 Street, 41-800 Zabrze.

autor

Sikora M.

• Department of Anesthesiology and Intensive Care, A. Mielecki Clinical Hospital, Medical University of Silesia, Katowice, Poland.

autor

Glasek J.

• Laboratory of Diagnostic Imaging, St. Leszczynski Hospital, Katowice, Poland

Bibliografia

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