There are multiple definitions:

1. left subclavian vein(English)

   • RSV
   • Anatomy

2. linear sweep voltammetry(English)

   • CV, GFAP, HS, IS, NC, PdNC
   • Cerebrovascular event
   • https://doi.org…604-023-06059-5

3. left sinus of Valsalva(English)

   • PSV, RSV
   • Cardiology, Coronary circulation
   • https://doi.org…bcr-2015-210850