There are multiple definitions:

1. mitral valve replacement / repair(English)

   • e.g. by a prosthesis. women have higher BSA-adjusted LV size by ESD, while ESV remains larger in men. Only men demonstrate a significant reduction in LV ESV after MVr, whereas women are more prone to postoperative LV dilatation and dysfunction. Also denoted as MVr
   • APS, AVR, BSA, GLS, LVEF, LVESD, LVESV, LVESVi, TVR
   • Cardiology, Surgery, Prosthetics, Gender aspects
   • https://doi.org…cho.2026.02.001

2. microvascular resistance(English)

   • rarely denoted as MR
   • AVP, CFR, FFR, MR
   • Hemodynamics, Coronary circulation, Microcirculation
   • https://doi.org…093/cvr/cvaa220
   • https://doi.org…554-022-02767-w

3. mass to volume ratio(English)

   • usually refers to left ventricle
   • EDV, LVM, LV
   • Ratio-based metric, Cardiology
   • https://doi.org…GING.115.004426
   • https://doi.org…93/ehjci/jez176