1Kushner FG, Hand M, Smith SC Jr, et al. 2009 focused updates: ACC/AHA guidelines for the management of patients with ST - elevation myocardial infarction ( updating the 2004 guideline and 2007 focused update) and ACC/AHA/SCAI guidelines on percu- taneous coronary intervention (updating the 2005 guideline and 2007 focused update) : a report of the American College of Cardi- ology foundation/American Heart Association task force on prac-tice guidelines[J]. Circulation, 2009, 120(22) : 2271 - 2306.
2Dracup K, Moser DK, Eisenberg M, et al. Causes of delay in seeking treatment for heart attack symptoms[J]. Soc Sci Med, 1995, 40(3): 379- 392.