Sudden/unexplained death or cardiac arrest occurred in ~1 in 5,000 patients in the MANIFEST-US registry. Studying these rare events will require learning from the patient, clinical and procedural characteristics of the rare patients who suffer these early unexplained deaths.

TRACE-PFA will be a retrospective patient-level registry of all patients who suffered early sudden/unexplained deaths early after pulse field ablation for atrial fibrillation or related arrhythmias.