| LSM | late systolic murmur; lymphocyte separation medium; lysergic acid morpholide |
|---|---|
| MDM | medical decision making; mid-diastolic murmur; minor determinant mix [penicillin] |
| MER | mean ejection rate; medical emergency room; methanol extraction residue; murmur/energy ratio |
| PM | after death (Lat. post mortem); after noon [Lat. post meridiem]; mean pressure; pacemaker; pantomogr... |
| PSM | postmitochondrial supernatant; presystolic murmur |