RESUMO
Forty patients with a single septal accessory pathway were included in this study and divided into two equal groups. Ablation for group I patients was done in the power controlled mode using the RF generator [3-D, Radioncics] that allows continuous measurements of current, voltage, power, time and impedance. Ablation for group II was done in the temperature controlled mode using the RF generator [3-E, Radioncics], where the power supply automatically modulates the amount of power delivered to that the tip temperature approaches, but does not exceed that selected temperature >5C. The initial target temperature was set at 70C. After ablation, patients of both groups were followed for three months. It was concluded that temperature monitoring incorporating closed loop feedback control is a valuable tool during RF ablation of septal accessory pathways as it provides important information regarding the adequacy of tissue heating, reduces the RF pulses application and prevents coagulum formation with a temperature of 70C, thus reducing the time of harmful radiation exposure as well as the procedure time