Some of the stuff from the Wikipedia entry Steve quotes below seems to come from ER Stories, which is a blog about "Shocking, Hilarious, Bizarre, and Sad Tales from the Emergency Room."
Here`s their entry on slang
—and here are some quotes about the effects of large scale Hispanic immigration on Emergency Rooms:
7. STATUS HISPANICUS - an offensive but often used term (sometime by other Hispanics) describing a hysterical Hispanic patient (traditionally Puerto-Rican or Dominican - almost never Mexican however). Often screaming â€?Eye yieye yieye yieyeâ€? (see Eye- tach below). A spoof of the medical terms â€?Status Asthmaticus and Status Epilepticusâ€? describing severe, nonstop asthma attacks or seizures. See below OMD below as well. One of the terms I avoid using.8. OMD - Oh Mi Duele. Means â€?Oh I have pain!â€? in Spanish. A take off on EMD which means â€?electro-mechanical dissociationâ€? - an serious cardiac rhythm disturbance. Used like â€?She is going into OMD, give her some Morphineâ€?.9. Eye - tach- A spoof of V-tach which is short for Ventricular Tachycardia, a life-threatening cardiac arrhythmia. Someone goes into Eye-tach from OMD - Eyeyeyeyeyeyeyeyeyeyeyeye.