Esophageal luminal temperature measurement underestimates esophageal tissue temperature during radiofrequency ablation within the canine left atrium: comparison between 8 mm tip and open irrigation catheters.

摘要: INTRODUCTION: Evaluation of luminal temperature during left atrial ablation is used clinically; however, does not necessarily reflect within the esophageal wall and poses a risk atrioesophageal fistula. This animal study evaluates its relation to external tissue lesions using 8 mm solid tip open irrigated catheters (OIC). METHODS AND RESULTS: A thermocouple was secured surface esophagus at level atrium dogs. Luminal measured standard probe. In four randomized dogs, were placed an catheter. six 3.5 OIC. The average peak when OIC significantly higher than that catheter (88.6 degrees C +/- 15.0 vs. 62.3 12.5 C, P < 0.05). Both had temperatures (OIC: 88.6 vs 39.7 0.82 0.05) (8 mm: 39.0 0.5 achieved faster in as compared lumen esophagus, although peaked for 25 seconds 90 seconds, 63 105 CONCLUSION: Despite significant difference actual temperatures, no observed between