| 摘要 |
Apparatus and methods for ablating tissue such as cardiac tissue. The apparatus includes a probe carrying a first ablation element 11 which may include an ultrasonic transducer and a balloon structure which directs the ultrasonic energy, and an additional ablation element 17 located distal to the first ablation element. The mode of operation of the additional ablation element 17 may be different from that of the first ablation element 20. Both ablation elements may be positioned by positioning the probe. The first ablation element may be arranged to form a loop-like lesion, whereas the additional ablation element may be arranged to form a spot-like lesion.
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