Randomized Comparison of Continuous and Intermittent Heparin Infusion During Catheter Ablation of Atrial Fibrillation

continuous group is given an initial intravenous heparin 100u/kg and then maintain heparin infusion during procedural.

Intermittent group is given an initial intravenous heparin 100u/kg. Then The ACT is tested every 30min with administration of additional heparin boluses and titration of the heparin drip based on the results and according to the judgment of the operating physician.