There are multiple definitions:

1. Sectorale Berichten Voorziening(Dutch)

   • https://www.rij…n-de-zorg-sbv-z

2. stressed blood volume(English)

   • a major determinant of systemic and pulmonary venous pressures which, in turn, determine left and right ventricular fillings and regulates cardiac output via the Frank-Starling mechanism. Understanding which circulatory factor(s) are quantitatively most important could help focus efforts to identify appropriate therapeutic targets
   • CO, FSM, LVEDP, TBV, UBV, CVP, EDPVR, EDV, ESPVR, eSBV, ESV, HFpEF, PCWP
   • Hemodynamics, Cardiology, Biophysics
   • https://doi.org…LURE.121.009156
   • https://doi.org…/JAHA.121.02158
   • https://doi.org…JAHA.121.021584

3. skin blood volume(English)

   • ANS, BRS, CFS, CRI, CV4, CVH, HF, HRV, LF, MFHA, NTS, OCF, OCMM, OMT, PPG, PRM, retR, THW
   • Reflex, Brain (dys)function, Nervous activity - (para)sympathetic
   • https://doi.org…al.pone.0317300