| ISDN | integrated services digital network; isosorbide dinitrate |
|---|---|
| IVDSA | intravenous digital subtraction angiography |
| LADD | lacrimo-auriculo-dento-digital [syndrome]; left anterior descending diagonal [coronary artery] |
| MDP | manic-depressive psychosis; maximum diastolic potential; maximum digital pulse; methylene diphosphat... |
| MIDI | musical instrument digital interface |