Optimal target temperature for slow pathway ablation in patients with atrioventricular nodal reentrant tachycardia

Haghjoo, M. and Arya, A. and Heidari, A. and Fazelifar, A.F. and Sadr-Ameli, M. (2006) Optimal target temperature for slow pathway ablation in patients with atrioventricular nodal reentrant tachycardia. Journal of Interventional Cardiac Electrophysiology, 15 (3). pp. 165-170.

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Objective: To define optimal target temperature for the slow pathway ablation. Materials and methods: In this study, 268 patients with atrioventricular nodal reentrant tachycardia (190 females; mean age, 49 ± 14 years) who underwent slow pathway ablation using a combined electroanatomic approach were enrolled. The patients were categorized into Group 1 if target temperature was <55°C or into Group 2 if target temperature was �55°C. Group 2 was divided into three subgroups of 55°C (Sgp-1), 60°C (Sgp-2), and 65°C (Sgp-3). Results: Acute success rate was similar in both groups (P = 0.83). The ablation time (26.2 ± 20 vs. 36.5 ± 28 min; P = 0.014), fluoroscopy time (11.6 ± 9.7 vs. 17.8 ± 16.6 min; P = 0.035), and number of applications (4.1 ± 3.2 vs. 9.1 ± 6.5; P = 0.02) were lower for Group 2 than Group 1 patients. The frequency of AV or VA block, impedance rise, and coagulum formation were comparable in two groups (all P > 0.05). During mean follow-up of 14 ± 3 months, recurrence of the arrhythmia was seen in higher proportion of Group 1 than Group 2 patients (P = 0.036). Among the Group 2 patients, there were no significant differences between the three subgroups in terms of acute success rate, fluoroscopy time, risks of AV and VA block, pericardial effusion, and recurrence (All P > 0.05). Number of applications and RF pulse duration were lower in Sgp-2 and 3 compared to Sgp-1 (All P > 0.05). Impedance rise and coagulum formation were slightly higher in Sgp-3 compared to Sgp-1 and 2 but this difference did not reach statistical significance (All P > 0.05). Conclusions: Compared to less than 55°C, target temperatures �55°C during slow pathway ablation significantly reduces fluoroscopy time, RF pulse duration, number of RF applications, and recurrence of AVNRT without increase in risk of AV or VA block or coagulum formation. © 2006 Springer Science+Business Media, LLC.

Item Type: Article
Additional Information: cited By 1
Uncontrolled Keywords: adolescent; adult; aged; article; atrioventricular block; blood clotting; cardiovascular risk; catheter ablation; controlled study; female; fluoroscopy; follow up; heart arrhythmia; human; impedance; major clinical study; male; pericardial effusion; priority journal; recurrent disease; reentry tachycardia; school child; statistical significance; temperature, Catheter Ablation; Female; Heart Conduction System; Humans; Male; Middle Aged; Tachycardia, Atrioventricular Nodal Reentry; Temperature; Thermography; Treatment Outcome
Subjects: WG Cardiovascular System
Depositing User: Librarian Farzaneh Dini
Date Deposited: 28 Jul 2020 08:52
Last Modified: 28 Jul 2020 08:52
URI: http://eprints.iums.ac.ir/id/eprint/12014

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