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Updated: Jun 9, 2025
Non-fluoroscopic Catheter Tracking for Fluoroscopy Reduction in Interventional Electrophysiology
Published on: May 26, 2015
Comparing Low-to-Zero Fluoroscopic Navigation Systems for AVNRT Catheter Ablation: A Network Meta-Analysis
Akaravit Thamthanaruk1, Vanit Nokkhuntong1, Patavee Pajareya1
1Center of Excellence in Arrhythmia Research, Cardiac Center, King Chulalongkorn Memorial Hospital, Faculty of Medicine, Division of Cardiovascular Medicine, Chulalongkorn University, Bangkok, Thailand.
Low-to-zero fluoroscopic navigation systems, including electroanatomic mapping (EAM), magnetic navigation systems (MNS), and intracardiac echocardiography (ICE), offer improved efficacy and safety for atrioventricular nodal reentrant tachycardia (AVNRT) ablation compared to conventional fluoroscopy (CF). These advanced systems significantly reduce radiation exposure, enhancing patient health outcomes.
Area of Science:
- Cardiology
- Medical Imaging
- Electrophysiology
Background:
- Conventional x-ray fluoroscopy (CF) is the standard for guiding catheter placement in cardiac ablation procedures.
- Advancements in technology have introduced alternative navigation systems to reduce radiation exposure.
- Key modalities include three-dimensional electroanatomic mapping (3D-EAM), magnetic navigation system (MNS), and intracardiac echocardiography (ICE).
Purpose of the Study:
- To compare the efficacy and safety of ICE, EAM, and MNS against CF for atrioventricular nodal reentrant tachycardia (AVNRT) ablation.
- To evaluate the impact of different navigation systems on procedural outcomes and patient safety.
Main Methods:
- A meta-analysis of observational studies and randomized controlled trials involving AVNRT patients undergoing catheter ablation.
- Primary endpoint: AVNRT recurrence post-procedure.
- Secondary endpoints: technical success, fluoroscopic time, radiation dose, ablation time, and adverse events.
Main Results:
- EAM demonstrated significantly higher technical success rates compared to CF.
- EAM showed the lowest fluoroscopic time, followed by MNS and ICE, all indicating reductions compared to CF.
- No significant differences in adverse events were observed across the navigation systems.
Conclusions:
- Navigation systems with low-to-zero fluoroscopy, particularly EAM, achieve higher efficacy in AVNRT ablation.
- These systems offer comparable safety to conventional fluoroscopy while substantially reducing radiation exposure.
- The findings support the adoption of advanced navigation systems to improve patient outcomes and safety in AVNRT ablation.
