Flow effect on lesion formation in RF cardiac catheter ablation

Hong Cao, Vicken R. Vorperian, Supan Tungjitkusolmun, Jang Zern Tsai, Dieter Haemmerich, Young Bin Choy, John G. Webster

研究成果: 雜誌貢獻期刊論文同行評審

42 引文 斯高帕斯(Scopus)


This study investigated the flow effect on the lesion formation during radio-frequency cardiac catheter ablation in temperature-controlled mode. The blood flow in heart chambers carries heat away from the endocardium by convection. This cooling effect requires more power from the ablation generator and causes a larger lesion. We set up a flow system to simulate the flow inside the heart chamber. We performed in vitro ablation on bovine myocardium with three different flow rates (0 L/min, 1 L/rain and 3 L/min) and two target temperatures (60 °C and 80 °C). During ablation, we also recorded the temperatures inside the myocardium with a three-thermocouple temperature probe. The results show that lesion dimensions (maximum depth, maximum width and lesion volume) are larger in high flow rates (p < 0.01). Also, the temperature recordings show that the tissue temperature rises faster and reaches a higher temperature under higher flow rate.

頁(從 - 到)425-433
期刊IEEE Transactions on Biomedical Engineering
出版狀態已出版 - 2001


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