| 摘要 |
A balloon catheter is capable of forming a transmural necrotic layer around the pulmonary vein ostium without excessively cauterizing the endocardium and of cauterizing portions of the four pulmonary veins around the ostium of the same one by one. The balloon catheter comprises: a catheter shaft consisting of a tubular outer shaft (2) and a tubular inner shaft (2), an inflatable balloon (4) capable of coming into contact with a predetermined annular portion of the entrance (20) of a pulmonary vein when inflated, a radio-frequency electrode (8) paired with a counter electrode (44) placed on the surface of a patient's body to transmit radio-frequency power, and placed in a wall forming the balloon (4) or in the balloon (94), a lead wire (12) electrically connected to the radio-frequency electrode (8), a cooling means (38) for pouring cooling liquid (36) to cool respective interior of the catheter shaft and the balloon (4), and a temperature sensor (14) for measuring temperature in the balloon (4).
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