Abstract
Compared to non-EMS group, EMS users were less likely to have history of angina or MI (10 vs 17 %; p=0.009), had lower rates of Killip class II/III on admission (5.4 vs 17%, p <.001), were more likely to present initially to a primary or secondary health care facility (77 vs 20%, p <.001) and had longer symptom onset-to-emergency room arrival time; but had shorter door-to-needle and door-to-balloon times (Figure, p <.05 for all time-lines).