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Abstract Objective To compare the efficacy and safety of Thermocool SF catheter to Thermocool catheter in atrial fibril ation (AF) ablation. Methods A total of 40 patients with paroxysmal AF were assigned randomly to undergo circumferential pulmonary veins isolation using Thermocool SF catheter with a porous tip (56 holes)(Group SF, n=20) or Thermocool catheter with 6 irrigation holes at the distal tip(Group TC, n=20). Results Ablation duration was significantly shorter [2 451s versus 2 859s (Z=2.083, P<0.05)] and irrigation volume was significantly lower [327ml versus 810ml (Z=5.058, P<0.01)] in group SF than in group TC. The total fluoroscopy time and radiation dose were significantly lower in group SF than in group TC [9.10 min versus 14.45 min (Z=2.137, P<0.05), 30.36±16.42 mGy versus 46.15±20.95 mGy (t=2.654, P<0.05), respectively]. There was no complication during and after the procedure in both groups. Conclusion AF ablation by Thermocool SF catheter is safety with more effective and less X- ray exposure than Thermocool catheter.
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