There are multiple definitions:

1. pressure work index(English)

   • expressed as mL O2 per 100 g and per minute
   • BW, DBP, EF, EW, HR, MVO2, PVA, SBP, SV, SW
   • Cardiology, Metabolism
   • https://doi.org…993.265.6.H1884

2. posterior wall isolation(English)

   • AF, LA, LAV, PVI, PeAF, RFCA, LAPWI
   • Cardiology, Surgery
   • https://doi.org…ard.2014.12.035
   • https://doi.org…cep.2020.08.016

3. posterior wall index(English)

   • ACEA, AWI, FEAR, LCEA, PAO
   • Skeleton and bone (formation), Orthopedics
   • https://doi.org…363546518810731

4. potential work index(English)

   • used to evaluate ventricular efficiency. According to the formula proposed by Rooke and Feigl: PWI = 4.08 x 10^-4 x (SBP x HR) + 3.25 x 10^-4 x (0.8 SBP - 0.2 DBP) x (HR x SV/BW) + 1.43
   • BW, DBP, HR, SBP, SV
   • Cardiology, Bioenergetics
   • https://doi.org…36/hrt.81.2.171

5. perfusion weighted image(English)

   • ARE, MRI, TRAM
   • Medical imaging, Signal analysis, Radiotherapy /radiation
   • https://doi.org…1060-018-2779-7