Three-dimensional ICE-guided AF ablation in Australia

Atrial fibrillation (AF) is common in Australia, and catheter ablation has become an established option for selected people with symptomatic paroxysmal or persistent AF. Three-dimensional intracardiac echocardiography (ICE) adds real-time imaging to the electrophysiology laboratory, helping operators visualise chambers, guide transseptal access and assess catheter relationships while treating pulmonary veins. It is a tool for safer, more reproducible procedures, but its value depends on integration, training and careful patient selection.

Unlike surface echocardiography, ICE uses a catheter-mounted transducer advanced through a venous catheter, usually via the femoral vein into the right atrium. Two-dimensional systems provide familiar cross-sectional views, while three-dimensional ICE reconstructs these images as a rotating volume that can be displayed from multiple angles. This can clarify complex anatomy, identify catheter movement and support electroanatomic mapping without relying on fluoroscopy alone.

The technology does not replace fluoroscopy, electroanatomic mapping or procedural judgement. Image quality can be affected by acoustic shadowing, blood, catheter angle and operator technique, and the operator must interpret depth and orientation correctly. Its greatest contribution is therefore as part of a disciplined workflow rather than as an isolated imaging display.

Australian practice combines public hospital services, private electrophysiology units and regional referral networks. Medicare covers much of the cost of an ablation, while private insurance and out-of-pocket charges may affect elective treatment. Many advanced procedures are concentrated in tertiary centres in Melbourne, Sydney, Brisbane, Adelaide and Perth, with local cardiologists and telehealth follow-up supporting patients living outside these cities.

Imaging, anatomy and procedural confidence

Three-dimensional ICE is particularly useful for understanding the left atrium, which is not directly visible from the transducer’s usual position in the right atrium. Maneouvring the catheter against atrial walls and around the fossa ovalis can improve visualisation of the interatrial septum and adjacent structures. The resulting dataset can complement electroanatomic mapping and cross-sectional imaging from computed tomography or magnetic resonance imaging.

An en face view of a pulmonary vein ostium can help an operator judge whether a catheter is inside, outside or close to the vein. This matters during pulmonary vein isolation, where the target is electrical disconnection of the vein rather than simply placing a lesion near its opening. Three-dimensional views may also improve awareness of neighbouring structures, such as the oesophagus, phrenic nerve and posterior left atrial wall, although they do not eliminate the need for complementary safeguards.

The technique can reduce dependence on fluoroscopy, which is valuable for operators, patients and staff. Radiation exposure is not automatically eliminated, however, because imaging requirements vary with anatomy, equipment, mapping systems and procedural difficulty. Institutions are increasingly measuring fluoroscopy time, radiation dose and staff exposure so that image optimisation can be demonstrated rather than assumed.

A structured ablation workflow

Before the procedure, the team should review symptoms, AF pattern, previous treatment, cardiac imaging, comorbidities and thromboembolic risk. Consent should explain the intended benefits, alternatives, recurrence risk and possible complications. Medication decisions, including anticoagulation and antiarrhythmic therapy, must follow the treating team’s assessment and should not be changed solely because ablation is planned.

Femoral venous access is obtained using ultrasound guidance where available, with the ICE catheter introduced and checked for imaging quality and interference. Anticoagulation, haemostasis and vascular closure are planned from the outset. The operator then develops a three-dimensional view of the right atrium and septum, confirming tissue contact and anatomical relationships before transseptal puncture.

Once atrial access is secured, left atrial geometry and the pulmonary veins are assessed. ICE can confirm catheter position, help prevent looping and identify unwanted movement within the atrium. The reconstruction is compared with electroanatomic mapping and pre-procedural imaging, with discrepancies investigated before radiofrequency energy is delivered.

Ablation proceeds around the pulmonary vein antra, using anatomical and electrophysiological endpoints such as local capture, lesion conspicuity and elimination of local electrograms. After waiting for potential acute reconnection, the vein is reassessed with pacing or other accepted confirmation methods. Catheters are removed, access sites are closed, and post-anaesthetic care includes surveillance for bleeding, tamponade, vascular injury and other complications. A clear handover and rhythm surveillance plan are completed before discharge.

Outcomes and recurrence surveillance

The success of ICE-guided ablation should be judged using more than a single rhythm strip. Relevant outcomes include freedom from symptomatic AF, time to recurrence, repeat procedures, hospital admissions, quality of life, anticoagulant use and safety. Results also depend on whether AF is paroxysmal, persistent or long-standing persistent, as well as comorbidity, atrial remodelling and prior treatment.

Current evidence supports improved visualisation and workflow efficiency, but three-dimensional ICE has not established universal superiority across every outcome. Studies differ in patient selection, ablation endpoints, recurrence definitions and follow-up methods, making direct comparison difficult. A centre may demonstrate benefit through lower fluoroscopy exposure, fewer access complications or improved lesion assessment without claiming that every clinical endpoint improves.

Recurrence remains possible after a technically successful procedure because AF can recur beyond the pulmonary veins or re-establish electrical conduction. Ambulatory monitoring and scheduled reviews are therefore integral to care. A relevant review of electrocardiographic predictors of recurrence provides useful context for interpreting rhythm signals and designing appropriate surveillance.

In Australia, follow-up may involve a hospital clinic, community cardiologist, general practice and remotely transmitted rhythm data. Long-term anticoagulation decisions remain linked to thromboembolic risk rather than the apparent success of ablation. Medication costs, device access and monitoring availability should be discussed before discharge so that patients can complete follow-up without unexpected financial or geographic barriers.

Delivery within Australian services

A reliable ICE service requires more than purchasing a system. Theatre staff must understand catheter handling, sterile preparation and emergency responses, while electrophysiology fellows need supervised exposure to image interpretation and reconstruction. In many Australian centres, this work is shared among electrophysiologists, cardiac imaging specialists, nurses, radiographers and anaesthesia staff.

Public and private delivery creates different operational pressures. Public theatre lists may involve coordination with cardiology and anaesthesia teams, while private units may streamline elective day-case treatment for insured patients. Private hospital facilities can also use ICE in procedures that would otherwise rely heavily on fluoroscopy, making equipment planning and credentialing important parts of the service model.

Geography affects access to advanced ablation and follow-up. Patients in regional and remote areas may need travel, accommodation and coordinated transport, sometimes followed by telehealth review. Culturally safe care, interpreter access and communication with Aboriginal and Torres Strait Islander patients are equally important, particularly when a procedure depends on attendance at several appointments and accurate reporting of palpitations, dizziness or fatigue.

Training, evidence and next steps

Operators need training in both the catheter and the imaging environment. Simulation can teach three-dimensional orientation, while supervised cases should cover difficult septal anatomy, imaging artefacts and safe recovery when reconstruction is uncertain. Credentialing should be supported by documented experience, observed competence and regular review of procedural outcomes.

Quality assurance can compare radiation exposure, procedure duration, complications, ablation findings and recurrence at defined intervals. Local registries and collaborative audits can distinguish benefits attributable to ICE from changes in mapping systems, ablation strategy or case selection. Patients should also be invited to report symptoms and rhythm experiences, because recurrence seen outside the laboratory may differ from routine device monitoring.

Clinicians and trainees can act on this workflow by reviewing current journal articles and practical guidance through the journal’s current journal articles. Share the evidence with the electrophysiology team, establish local image and credentialing standards, and begin a prospective audit of fluoroscopy, complications and recurrence.