Cavotricuspid isthmus ablation using a catheter equipped with mini electrodes on the 8 mm tip: a prospective comparison with an 8 mm dumbbell-shaped tip catheter and 8 mm tip cryothermal catheter

• DOI: 10.1093/europace/euv253
• Publication Date: 2015-11-12T01:28:13Z
• Authors: Jin Iwasawa; Shinsuke Miyazaki; Takamitsu Takagi; Hiroshi Taniguchi; Hiroaki Nakamura; Hitoshi Hachiya; Yoshito Iesaka
• Keywords: Male; Catheters; Equipment Design; Middle Aged; Cryosurgery; Electrodes, Implanted; 3. Good health; 03 medical and health sciences; Treatment Outcome; 0302 clinical medicine; Atrial Flutter; Japan; Catheter Ablation; Humans; Female; Prospective Studies; Tricuspid Valve; Aged

The mini electrodes (ME) placed on the tip of ablation electrode provide more precise local signal. We evaluated whether ME catheter was effective for cavotricuspid isthmus (CTI)-dependent atrial flutter. Eighty-five consecutive patients (68 men; 62 ± 10 years) underwent CTI either using a equipped with 8 mm (ME catheter) in 25 (Group A), dumbbell-shaped (DS) (DS 30 B), or cryothermal (Cryo C). In cases failed block, changed to other catheter, but remained original group following intention-to-treat analysis. endpoint achieved all after 13 7 applications Group A, 9 4 B, and 5 2 C (P < 0.001). fluoroscopic procedure times were significantly longer A (9 28 17 min, P = 0.001, 0.002, respectively) when compared Groups B (6 6 min) (4 3 14 min). crossover performed (56%) patients, (10%) patients. mean power delivered lower than (31.3 9.1 vs. 38.6 7.6 W, 0.015). found be less Cryo DS ablation.