Department of Emergency Medicine Hospital of Shandong University 250012;
Shandong Provincial Clinical Research Center for Emergency and Critical Care Medicine of Emergency and Critical Care Medicine of Shandong University Pain Center Hospital of Shandong University 250012;
Key Laboratory of Emergency and Critical Care Medicine ofShandong Province Laboratory of Cardiopulmonary-cerebral Resuscitation Research of Shandong Province Provincial Engineering Laboratory for Emergency and Critical Care Medicine Hospital of Shandong University 250012;
Key Laboratory of Cardiovascular Remodeling and Function Research Ministry ofEducation Ministry of Health and Chinese Academy of Medical Sciences State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine Hospital of Shandong University 250012;
Creatine kinase-myocardial band isoenzyme; Cardiac troponin; Acute myocardial infarction; Emergency department;