INTRODUCTION: Higher current density at the proximal end of a six-hole catheter is not irrigated and thus could lead to uneven heating and possibly coagulum and charring. This study tested a novel 12-hole irrigated catheter with six additional holes at the proximal end that provides more uniform cooling during atrial flutter (AFL) ablation. METHODS: A total of 188 patients (28 females, 66 ± 11 years) were treated for typical AFL at 22 sites in the USA and Canada using Cool Path Duo at 50 W and 45 °C at an irrigation rate of 13 ml/min. The results were compared to historical data from an AFL study which used a six-hole catheter with similar design. RESULTS: A total of 2,725 RF lesions were applied in 188 patients with a mean RF duration of 18.2 ± 11.7 min per procedure. Procedural success was achieved in 96.3 % (181 of 188) acutely and 98.3 % (173 of 176) patients at 3 months. Steam pops occurred in 0.6 % of lesions (15 of 2,725) without coagulum or charring… Compared to the six-hole irrigated tip catheter, the Cool Path Duo catheter delivered more power (33.8 ± 5.9 vs. 29.7 ± 5.2 W, p < 0.0001) at a lower average tip temperature (34.7 ± 1.5 vs. 37.2 ± 2.1 °C, p < 0.0001) with no statistical differences in either 3-month AFL recurrence or complications. CONCLUSION: Cool Path Duo™ irrigated tip catheter is safe and effective in treating typical AFL. When compared to a six-hole irrigated tip catheter, the Cool Path Duo catheter delivers more power at a lower temperature.
INTRODUCTION: Higher current density at the proximal end of a six-hole catheter is not irrigated and thus could lead to uneven heating and possibly coagulum and charring. This study tested a novel 12-hole irrigated catheter with six additional holes at the proximal end that provides more uniform cooling during atrial flutter (AFL) ablation. METHODS: A total of 188 patients (28 females, 66 ± 11 years) were treated for typical AFL at 22 sites in the USA and Canada using Cool Path Duo at 50 W and 45 °C at an irrigation rate of 13 ml/min. The results were compared to historical data from an AFL study which used a six-hole catheter with similar design. RESULTS: A total of 2,725 RF lesions were applied in 188 patients with a mean RF duration of 18.2 ± 11.7 min per procedure. Procedural success was achieved in 96.3 % (181 of 188) acutely and 98.3 % (173 of 176) patients at 3 months. Steam pops occurred in 0.6 % of lesions (15 of 2,725) without coagulum or charring… Compared to the six-hole irrigated tip catheter, the Cool Path Duo catheter delivered more power (33.8 ± 5.9 vs. 29.7 ± 5.2 W, p < 0.0001) at a lower average tip temperature (34.7 ± 1.5 vs. 37.2 ± 2.1 °C, p < 0.0001) with no statistical differences in either 3-month AFL recurrence or complications. CONCLUSION: Cool Path Duo™ irrigated tip catheter is safe and effective in treating typical AFL. When compared to a six-hole irrigated tip catheter, the Cool Path Duo catheter delivers more power at a lower temperature.
Authors: A Natale; K H Newby; E Pisanó; F Leonelli; R Fanelli; D Potenza; S Beheiry; G Tomassoni Journal: J Am Coll Cardiol Date: 2000-06 Impact factor: 24.094
Authors: Bernard Lim; Kalpathi L Venkatachalam; Arshad Jahangir; Susan B Johnson; Samuel J Asirvatham Journal: J Cardiovasc Electrophysiol Date: 2008-03-21