抄録
Ventricles of canines were ablated by Nd:YAG laser and radiofrequency wave energy (0.5MHz). Laser ablation was performed with 3 methods; non-contact, contact, and new contact methods. Radiofrequency wave ablation was performed using a round tip catheter (?2.5mm). The energy varied 15-45J. The shape of coagulation area was as follows; partial hemisphere at the non-contact method, elliptical hemisphere with charring at the contact method, partial hemisphere at the new contact method, and elliptical hemisphere at the radiofrequency wave (RFW). At 30 and 45J, the mean depth of RFW ablation was larger than that of other ablations (p<0.05). At 30 and 453, the mean width of RFW ablation was smaller than that of other ablations (p<0.05). The new contact ablation was most accurate between 3 laser ablation method. In conclusion, new contact laser ablation is suitable for ablation of wide area. RFW ablation is suitable for localized ablation.
