Cateter esofágico para medição de temperatura durante procedimento de ablação cardíaca por rádiofrequência (RF)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

The atrial-esophageal fistula is a potentially fatal complication of radiofrequency cardiac ablation. We developed a finite element model in order to determine the behavior of temperature along the region between the atrium and esophagus during the ablation procedure. The results of the model were used in order to design, build and test an esophageal catheter. The catheter accuracy was 0,05 C in the 25 C - 75 C range (p<0,05). In addition, we developed an instrument to measure the thermal relaxation time of agar a commonly used substance for the study of ablation procedures. The results showed that its thermal relaxation time and thermal diffusivity was of 4,69 seconds and 1; 3679e��7 2; 76e��9m2=s respectively.

ASSUNTO(S)

vádio frequência cateter esofágico condução hiperbólica de calor engenharia eletrica simulação modelagem em elementos finitos ablação

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