In the case of emergency angioplasty, for hospitals it seems that it's not just how many you do, but how used to doing them you are. The overall commitment to doing emergency angioplasties, and the protocols and staffing that come out of that commitment, appear to be key.

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There are many more issues involved in regionalizing heart attack care, with proximity to specialized hospitals being necessary, but not sufficient, for making such a system feasible.

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