Pregled bibliografske jedinice broj: 231524
Computer simulation of transesophageal pacing with conventional and selective leads using 3-D models
Computer simulation of transesophageal pacing with conventional and selective leads using 3-D models // 3rd European Medical & Biological Engineering Conference : IFMBE European Conference on Biomedical Engineering EMBEC'05 ; Book Series IFMBE Proceedings ; Vol. 11 / Kneppo, Peter ; Hozman, Jiri (ur.).
Prag: EMBEC'05 & IFMBE, 2005. str. 2864-2869 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)
CROSBI ID: 231524 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Computer simulation of transesophageal pacing with conventional and selective leads using 3-D models
Autori
Lacković, Igor ; Magjarević, Ratko
Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni
Izvornik
3rd European Medical & Biological Engineering Conference : IFMBE European Conference on Biomedical Engineering EMBEC'05 ; Book Series IFMBE Proceedings ; Vol. 11
/ Kneppo, Peter ; Hozman, Jiri - Prag : EMBEC'05 & IFMBE, 2005, 2864-2869
Skup
European Medical & Biological Engineering Conference : IFMBE European Conference on Biomedical Engineering (3 ; 2005)
Mjesto i datum
Prag, Češka Republika, 20.11.2005. - 25.11.2005
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Međunarodna recenzija
Ključne riječi
electrostimulation; transesophageal cardiac pacing; pacing leads; 3D finite element model
Sažetak
Design of a pacing lead for efficient and safe transesophageal pacing is of great importance because the lead configuration determines the current density distribution in the surrounding tissue. Consequently the lead configuration influences the pacing threshold (mA), esophageal thermal injury (if any), and unintentional stimulation of adjacent nerves and muscles. We present two types of transesophageal pacing leads – a conventional one with cylindrical electrodes and a selective lead where electrodes comprise only a part of cylinder’ s side surface. We analyzed, using 3-D geometrical models, the influence of interelectrode distance (from 2 cm to 10 cm) and central angle of the electrode (from 20° to 360°) on the current density distribution for the case of constant current stimulus of 20 mA. The results clearly show that electrodes with smaller central angle direct the current in the desired direction, but current density at electrode edges rises as well as the voltage between the electrodes. The effect of increased current density in front of the electrodes sharply decreases with radial distance from the lead axis. Increase of interelectrode distance has similar effect as the change from bipolar to monopolar stimulation. Implications of the results for in vivo situation regarding the pacing threshold and possible risk of esophageal burn injury were discussed.
Izvorni jezik
Engleski
Znanstvena područja
Elektrotehnika
