"Emergency Department Bypass for ST-Segment–Elevation Myocardial Infarction Patients Identified With a Prehospital Electrocardiogram"
JACC Jun 20
http://circ.ahajournals.org/content/128/4/352.full 
"Conclusions—Among ST-segment–elevation myocardial infarction patients identified with a prehospital ECG, the rate of ED bypass varied significantly across US hospitals, but ED bypass occurred infrequently and was mostly isolated to working hours. Because ED bypass was associated with shorter reperfusion times and numerically lower mortality rates, further exploration of and advocacy for the implementation of this process appear warranted."