Electrophysiology Ablation

Catheter-based treatment of cardiac arrhythmias — atrial fibrillation, atrial flutter, SVT, VT, WPW. 3D electroanatomic mapping (CARTO, EnSite, Rhythmia) is primary; fluoroscopy is reduced-role confirmation of catheter position, transseptal puncture, and backup. Pulsed-field ablation is rapidly displacing RF and cryo for pulmonary vein isolation in current practice.

Clinical pathway

Femoral venous access — multiple sheaths (diagnostic, mapping, ablation, ICE).
Transseptal puncture (for left-sided procedures) under ICE + fluoroscopy.
3D map acquisition — electroanatomic, often supplemented by CT / MRI fusion.
Ablation delivery — RF, cryoballoon, or pulsed field; pulmonary vein isolation for AF, linear lines + CFAE for persistent AF, substrate-based for VT.
Testing + waiting period — confirm durable isolation, adenosine challenge for dormant conduction.

Typical systems

Philips Azurion 7 with EP package
Philips Allura Xper FD10 (large refurb base)
Siemens Artis zee
Siemens Artis Q
GE Innova 2100-IQ

EP labs run very low fluoroscopy — mapping does most of the work. Many centers run "zero-fluoro" AF cases.

Room + procedure characteristics

Procedure time: 2–4 hours (AF), 1–2 (SVT), 4–6+ (complex VT).
Team: EP cardiologist, EP tech, anesthesia (general for AF), mapping specialist (industry or in-house).
Dose: very low by IR standards due to mapping-first workflow.

Equipment considerations that bite

Mapping system is the room. CARTO (Biosense Webster), EnSite (Abbott), Rhythmia (Boston Scientific) — the EP cath lab is fundamentally a mapping-system room with imaging support, not the other way around.
Imaging integration with mapping — CARTOMERGE, EnSite Verismo, MediGuide and similar fluoro-mapping fusion features depend on cooperative imaging-system telemetry. Vendor lock-in patterns matter; not all imaging chassis pair cleanly with all mapping systems.
Small detector / FD10-class is acceptable and common — EP doesn't need large-FOV. A refurb FD10 cardiac room is well-suited.
Recording / stimulation system — Bard / GE CardioLab, Prucka, Workmate Claris. Hemodynamics + EP recording is its own domain, often adjacent to but separate from the cath-lab Sensis / Xper IM stack.
ICE compatibility — intracardiac echo (AcuNav, ViewFlex) is universally used; the room needs ultrasound-cart space and HDMI / DICOM integration.
Pulsed-field ablation generator — site planning for PFA generators (FARAPULSE, Affera, PulseSelect) is a current capital event for AF programs. Plan for it on new builds.

Operational reality

Mapping specialist is a clinical-personnel constraint, not an equipment one. AF programs scale by mapping-specialist coverage; the chassis sits idle without one.
Throughput is anesthesia-time-limited in AF programs. General anesthesia turnover is the bottleneck on high-volume PVI days.
Refurb economics — FD10-class cardiac rooms are abundant on the refurb market and well-suited to EP. The mapping system is far more capital-intense than the imaging system in modern EP build-out.
Pulsed-field ablation is reshaping case mix and case length — programs that adopt PFA early run shorter cases and higher daily volume, changing room-utilization economics.