What this phase means
This study does not use the classic phase 1–4 drug ladder. It may be a device, a behavior program, a surgery timing study, or an early feasibility test.
Phase labels are FDA/ICH categories applied to the registry Phase field. They are not a finding that this study succeeded.
What the registry says happens
If you join, the listed intervention(s) are Pulmonary vein isolation, RETRO-Mapping without adjunctive ablation, or Adjunctive ablation guided by RETRO-Mapping. The registry lists allocation as randomized. Recurrent focal electrical activation (or ectopy) superseding sinus activation is the only mechanism proven to drive paroxysmal atrial fibrillation (AF).
They plan to enroll about 110 people at London. Taking part typically means a procedure as part of the study plus check-ins.
Official title (unrewritten)
Ablation of Focal Activation During Persistent Atrial Fibrillation to Determine the Characteristics of Focal Drivers
Interventions: Pulmonary vein isolation, RETRO-Mapping without adjunctive ablation, Adjunctive ablation guided by RETRO-Mapping
Primary outcome (registry wording): Atrial fibrillation cycle length in coronary sinus and left atrial appendage