Understanding the technology
About This Technology.
FARAPULSE Pulsed Field Ablation (PFA) is a catheter ablation system for atrial fibrillation. It delivers very short electrical pulses that switch off heart muscle tissue around the openings of the pulmonary veins, where the signals that trigger atrial fibrillation often start. Unlike heat or cold ablation, this energy works by opening tiny pores in heart muscle cells.
What Is FARAPULSE Pulsed Field Ablation?
Atrial fibrillation (AF) is a rhythm disorder in which the upper chambers of the heart quiver irregularly. It is often triggered by heart muscle around the openings of the pulmonary veins, the vessels that carry blood from the lungs to the left upper chamber. AF ablation aims to electrically disconnect these vein openings from the rest of the chamber so the trigger signals can no longer spread. This is called pulmonary vein isolation.
FARAPULSE is an ablation system made by Boston Scientific that performs this isolation using pulsed electrical fields (pulsed field ablation, or PFA).
How Pulsed Field Energy Works
Older, established ablation methods use heat (radiofrequency) or cold (cryoablation) to create scar tissue. PFA uses very brief, high-voltage electrical pulses. These pulses open tiny pores in the walls of heart muscle cells, so the cells in the target area stop conducting electrical signals. This process is called electroporation.
Heart muscle cells are more sensitive to this electrical field than some nearby tissues, such as the esophagus and the nerve that controls the diaphragm (the muscle between the chest and abdomen). This property is the reason PFA was developed, although risks remain.
Who Can Have This Procedure
According to the 2024 ESC guidelines, catheter ablation is considered for people with AF whose symptoms continue despite rhythm medicines, and in certain cases it can be a first-line option. The choice of energy, PFA or heat or cold ablation, is made by your electrophysiologist based on your type of AF, heart anatomy, and overall condition.
Preparation, Procedure, and Recovery
The procedure takes place in the Electrophysiology (EP) Laboratory, usually under general anesthesia or deep sedation, because the pulses can make body muscles twitch. Catheters are inserted through a vein in the groin and then pass through the thin wall between the right and left upper chambers to reach the pulmonary veins. Afterward, you lie flat for a few hours and are monitored; many patients go home the next day. Blood thinners are usually continued for some time, and whether to keep taking them depends on your stroke risk, as decided by your doctor.
Risks and Limits
Like other ablation methods, PFA carries risks, including bruising or bleeding at the puncture site and, rarely, fluid building up around the heart (tamponade), stroke, or temporary narrowing of a coronary artery. AF can also come back, and some patients need a repeat procedure. Your doctor will explain the benefits and risks for your situation before the procedure.
Clinical use
Uses and Benefits.
Whether this technology suits your condition is decided by a doctor after an evaluation.
- Pulmonary vein isolation in paroxysmal (intermittent) atrial fibrillation
- Ablation of persistent atrial fibrillation, at your doctor's discretion
- Rhythm control when atrial fibrillation symptoms continue despite medicine
- Part of a rhythm control plan alongside medicines and lifestyle changes
Benefits for the Doctor's Assessment
Energy Without Heat or Cold
Target tissue is switched off with very brief electrical pulses rather than by heating or freezing it.
Targets Heart Muscle Cells
Heart muscle cells are more sensitive to this electrical field than some nearby tissues, such as the esophagus and the nerve to the diaphragm.
Studied in a Randomized Trial
The ADVENT trial, published in 2023, compared PFA with heat and cold ablation in paroxysmal AF; at one year, PFA was noninferior for both effectiveness and safety.
Brief Technical Information
- Procedure type
- Catheter ablation for atrial fibrillation (pulmonary vein isolation)
- Energy source
- Pulsed electrical field, not heat or cold
- Manufacturer
- Boston Scientific
- Usual anesthesia
- General anesthesia or deep sedation
- Procedure guidance
- X-ray (fluoroscopy) to guide catheter position
- Service location
- Electrophysiology (EP) Laboratory, Arrhythmia and Device Center
