| LRA | low right atrium |
|---|---|
| LRQ | lower right quadrant |
| LSRA | low septal right atrium |
| MDA | malondialdehyde; manual dilation of anus; methylene dianiline; 3,4-methylenedioxyamphetamine; minima... |
| MDP | manic-depressive psychosis; maximum diastolic potential; maximum digital pulse; methylene diphosphat... |