Low-Power Long-Duration Versus High-Power Short-Duration Radiofrequency Ablation of the Atrioventricular Node

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Background:

• Atrioventricular node (AVN) radiofrequency (RF) ablation is a key treatment for refractory atrial tachyarrhythmias.
• Limited comparative research exists on the properties of various RF ablation catheters.
• This study addresses the need to compare the effectiveness of different RF catheters for AVN ablation.

Purpose of the Study:

• To compare the effectiveness and procedural characteristics of different RF ablation catheter types in AVN ablation.
• To evaluate safety and efficacy across unirrigated (UI), externally irrigated (low-power long-duration [LPLD] and high-power short-duration [HPSD]), and contact force sensing catheters.

Main Methods:

• 66 patients undergoing AVN RF ablation were analyzed.
• Catheters included unirrigated (UI), externally irrigated (LPLD and HPSD), and contact force sensing types.
• Success rates were compared using logistic regression, and lesion times using linear regression.

Main Results:

• All ablation procedures were successful with no immediate complications.
• High-power short-duration (HPSD) catheters showed significantly shorter lesion times compared to UI catheters (mean difference: 403.42 seconds).
• Catheter distribution: UI (48%), LPLD (16%), HPSD (36%).

Conclusions:

• Unirrigated (UI), low-power long-duration (LPLD), and high-power short-duration (HPSD) catheters are equally safe and effective for AVN ablation.
• HPSD catheters offer a significant reduction in lesion time, leading to decreased overall procedure time.