| MPV | main portal vein; mean platelet volume; mitral valve prolapse |
|---|---|
| MRAP | alpha-2-macroglobulin; maximal resting anal pressure; mean right atrial pressure |
| MRBF | mean renal blood flow |
| MREI | mean rate ejection index |
| MRP | mean resisting potential; medical reimbursement plan; multidrug resistance-associated protein |