Measuring Local Potentials in PFA. MULTI PFA (EU)

Atrial fibrillation (AF) is the most common cardiac arrhythmia and is associated with a five-fold increase in stroke. Pulmonary vein isolation (PVI) has become a first-line treatment for paroxysmal AF. PVI is achieved by ablating cardiac tissue around the pulmonary veins. Until recently, this has been achieved using thermal energy. However, more recently a new energy source known as pulsed field ablation (PFA) has been introduced. As PFA is tissue selective, it preserves the function of nearby structures such as the esophagus and phrenic nerve making it safer to use. As PFA is delivered in short bursts of high energy, it is also more efficient and leads to shorter procedures. However, the catheters designed to deliver PFA differ to those used previously and do not provide the same information about efficacy, making it more difficult for the operator to ascertain if the lesions have successfully isolated the pulmonary vein. This exploratory observational study will assess the utility of a software module designed to measure the local potential derived from the unipolar electrogram recorded at the electrode that has delivered the PFA. During the procedure, the study will collect data only and all analysis of the output of the PFAnalyzer software module will be made off-line once the procedure is complete. The operator will follow the hospital's standard of care during the procedure, and the software module will not be used to guide therapy, nor will there be any additional time added to the procedure. The study is a prospective, multi-center, exploratory, observational study with the ECGenius® System and the PFAnalyzer software module in PFA cases using the Affera Sphere 9, FaraWave, PulseSelect or VariPulse PFA systems. The cohort will be adult patients with paroxysmal or persistent atrial fibrillation (AF) who undergo PVI using PFA.