| 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 |
| SEA | sheep erythrocyte agglutination; shock-elicited aggression; soluble egg antigen; spontaneous electri... |