| 摘要 |
A dual curve ablation catheter (2), especially suited for treating atrial flutter, includes a shaft (4) with a deflectable tip (20) at the distal end (6) and a handle (10) at the proximal end (8). The tip includes a highly flexible distal segment (30), a relatively stiff intermediate segment (28) and a flexible proximal segment (26) so that pulling on a manipulator wire (16) attached to the distal segment causes the distal segment to curve and engage, for example, an isthmus of tissue (106) adjacent the tricuspid valve (104) and the inferior vena cava (98) and causes the proximal segment to curve and press against the wall (110) of the inferior vena cava so to stabilize the catheter. Ablation energy can be supplied through the ablation electrodes (48, 68) simultaneously or one at a time to ablate tissue at the isthmus without the need for moving the catheter.
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