| HSTF | heat shock transcription factor; human serum thymus factor |
|---|---|
| IPS | idiopathic pain syndrome; idiopathic postprandial syndrome; inches per second; infundibular pulmonar... |
| IST | inappropriate sinus tachycardia; insulin sensitivity test; insulin shock therapy; International Soci... |
| ITS | infective toxic shock |
| OCSI | orthostatic change in shock index |