Ablación quirúgica de la fibrilación auricular con radiofrecuencia biauricular epicárdico-endocárdica: experiencia inicial

Sos, Fernando Hornero; Argudo, J.A. Montero; Albarova, Oscar Gil; Fuster, Rafael García; Fernández, Felipe Atienza; Serrano, Rafael Payá; Bosca, J.L. Perez; Dorador, Aurelio Quesada; López, Sergio Cánovas; Sorli, María José Dalmau; Codoñer, María Bueno

doi:10.1016/s0300-8932(02)76591-3

Cited by 3 publications

(1 citation statement)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, it would also be reasonable to think that the location of the fat layer (close to versus far from the active electrode) is a key factor only when a voltage-constant ablation is carried out, and is less important when a temperature-constant protocol is used. However, our clinical experience in epicardial ablation using a temperature-constant protocol (Hornero et al 2002) showed that it is extremely difficult to efficiently ablate on adipose epicardial tissue. Probably, the main difference between the computer results presented here and those reported in our previous modeling study (Berjano and Hornero 2004) is not the protocol employed (temperature constant and voltage constant, respectively), but the thickness of the fat layer considered (0.9 mm and 1−5 mm, respectively).…”

Section: Assessment Of the Impact Of Each Factormentioning

confidence: 99%

What affects esophageal injury during radiofrequency ablation of the left atrium? An engineering study based on finite-element analysis

Berjano

Hornero

2005

Physiol. Meas.

View full text Add to dashboard Cite

Recent studies on intraoperative radiofrequency ablation of atrial fibrillation have reported some cases of injury to the esophagus. The aim of this study was to perform computer simulations using a theoretical model in order to investigate the effect of different factors on the temperature distributions in the esophagus during ablation. A three-dimensional model was built to include an active electrode, atrial tissue, epicardial fat layer and a fragment of esophagus, aorta and lung, all linked by connective tissue. The finite-element method was used to calculate the temperature distribution during a procedure of constant-temperature ablation. The lesion geometry was assessed using a 50 degrees C isotherm. Our results show that the electrical power directly applied to the esophagus is insignificant and hence the esophageal injury is exclusively due to thermal conduction from the atrium. The esophageal lesion is mainly influenced by the thickness of connective tissue. Both the programmed target temperature of the electrode and the duration of the ablation also have a significant effect on the lesion in the esophagus. In contrast, the epicardial fat layer (0.9 mm thickness) did not show a significant influence. In conclusion, this theoretical model allows us to study the effect of different factors on the thermal injury in the esophagus during intraoperative radiofrequency ablation of atrial tissue.

show abstract

Section: Assessment Of the Impact Of Each Factormentioning

confidence: 99%