Fluoroscopy-Free Catheter Ablation Techniques in Cardiac Electrophysiology

Conventional catheter ablation relies on X-ray fluoroscopy to visualise intracardiac catheters, exposing patients and staff to ionising radiation. In recent years, integration of three-dimensional electroanatomical mapping systems and intracardiac echocardiography has enabled completely fluoroscopy-free workflows. These approaches harness real-time, high-density anatomical and electrical reconstructions to guide catheter positioning and lesion delivery without X-ray guidance. Zero-fluoroscopy techniques have been applied across a range of arrhythmias—from atrial fibrillation and atrial flutter to supraventricular and ventricular tachycardias—demonstrating comparable acute success, safety profiles and long-term outcomes to conventional fluoroscopic methods. Adoption of these techniques not only mitigates the cumulative radiation burden but also eliminates the need for cumbersome protective apparel, improving operator ergonomics. Early experiences document a transient learning curve, after which procedural times often match or exceed those achieved under fluoroscopy. As mapping platforms evolve and intracardiac imaging becomes more ubiquitous, fluoroscopy-free ablation is poised to become standard practice in high-volume electrophysiology centres globally.

Research from Nature Portfolio

Initial experience with zero-fluoroscopy pulmonary vein isolation in patients with atrial fibrillation demonstrated that a completely fluoroless approach is feasible and safe in an unselected cohort of one hundred consecutive cases. Compared with standard fluoroscopy-guided procedures, the zero-fluoroscopy group experienced significantly shorter overall and access times, achieved 100 % acute success and incurred no major complications, with radiation exposure reduced to zero. In a separate single-centre series of seventy-six patients undergoing diverse arrhythmia ablations, a transition to a fluoroless workflow utilising intracardiac echocardiography combined with a three-dimensional mapping system was achieved in fifty-eight cases. All procedures were completed without X-ray, with no adverse events and with procedure durations equivalent to those performed under fluoroscopic guidance, across pulmonary vein isolation, atrial flutter, paroxysmal supraventricular tachycardia and ventricular arrhythmia substrates.

Fluoroscopy-Free Catheter Ablation Techniques in Cardiac Electrophysiology publication trend

The graph below shows the total number of articles in fluoroscopy-free catheter ablation techniques in cardiac electrophysiology across all publications each year (not limited to Nature Index journals).

Technical terms

Fluoroscopy: A living X-ray imaging technique that provides real-time visualisation of internal structures, commonly used to guide catheter placement during interventional procedures.

Electroanatomical mapping system: A three-dimensional navigation platform that reconstructs cardiac chambers and electrical activation patterns, enabling catheter tracking without reliance on X-ray imaging.

Intracardiac echocardiography (ICE): An ultrasound modality delivered via a specialised catheter positioned within the heart, offering high-resolution images of intracardiac structures and catheter-tissue interfaces.

Pulmonary vein isolation (PVI): A catheter ablation procedure that electrically isolates the pulmonary veins from the left atrium to prevent atrial fibrillation triggers originating in the vein ostia.

References

1. Initial experience with zero-fluoroscopy pulmonary vein isolation in patients with atrial fibrillation: single-center observational trial. Scientific Reports (2024).
2. The Fluoroless Future in Electrophysiology: A State-of-the-Art Review. Diagnostics (2024).
3. Zero fluoroscopy catheter ablation for atrial fibrillation: a systematic review and meta-analysis. Frontiers in Cardiovascular Medicine (2023).
4. Zero Fluoroscopy Arrhythmias Catheter Ablation: A Trend Toward More Frequent Practice in a High-Volume Center. Frontiers in Cardiovascular Medicine (2022).