There are multiple definitions:

1. posterior (segment of) arcuate fasciculus(English)

   • Anatomy, Brain (dys)function
   • https://doi.org…tex.2016.03.012

2. paroxysmal atrial fibrillation(English)

   • defined as at least 1 day with ≥6 minutes of AF but <7 days with >23 hours of AF. Also denoted as PAF or pxAF
   • AF, PAF, pxAF, AAD, CCI, CDM, CIED, ICD, ICM, OAC, PeAF, PermAF
   • Cardiology, Electrophysiology, Pathology
   • https://doi.org…acc.2022.01.042
   • https://doi.org….1002/jcu.23555
   • https://doi.org…NAHA.124.069757