2007 focused update of the ACC/AHA 2004 Guidelines for the Management of Patients With ST-Elevation Myocardial Infarction : a report of the American College of Cardiology/American Heart Association Task Force on Practice Guidelines : developed in collaboration With the Canadian Cardiovascular Society endorsed by the American Academy of Family Physicians : 2007 Writing Group to Review New Evidence and Update the ACC/AHA 2004 Guidelines for the Management of Patients With ST-Elevation Myocardial Infarction, Writing on Behalf of the 2004 Writing Committee