There are multiple definitions:

1. variant-specific surface protein(English)

   • Proteins / proteomics

2. vertical shock pylon [prosthesis](English)

   • SACH
   • Prosthetics
   • https://doi.org…t.1999.29.9.526

3. [cerebral] vasospasm(English)

   • is the leading risk factor of neurological deterioration (i.e., delayed cerebral ischemia and cerebral infarction) after aneurysmal subarachnoid hemorrhage
   • aSAH, DCI
   • Neuropathy, Risk factor
   • https://doi.org…120-022-00348-6