There are multiple definitions:

1. Ambulatory Patient Group(English)

   • classification for surgical procedure
   • APC
   • Classification, Surgery

2. atrial appendage(English)

   • AF
   • Cardiology, Electrophysiology
   • https://doi.org….1002/jcu.23555
   • https://doi.org…1111/echo.15772

3. anterior-posterior-glide(English)

   • refers to mobile bearing knee design
   • LCS, RP
   • Orthopedics
   • https://doi.org…453670710013942

4. air plethysmography(English)

   • a non-invasive diagnostic test that quantifies chronic venous disease (CVD) by measuring volumetric changes in the lower leg, specifically assessing venous reflux, obstruction, and calf muscle pump function. It uses an air-filled cuff to provide objective data on hemodynamics (VFI, EF, RVF)
   • CVD, EF, RVF, VFI, VFR
   • Vascular disease, Diagnostics
   • https://doi.org…677-5449.002116