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[Clinical characteristics of and related treatments on 1004 patients with acute myocardial infarction from March 2004 to March 2007].

OBJECTIVE
To study the change of baseline clinical characteristics including prehospital delayed time (PDT), modes of transportation and treatment for patients with acute myocardial infarction (AMI) in the past 3 years.


METHODS
We used the same questionnaire to accurately collect and retrospectively analyze the data regarding clinical characteristics of all 1004 patients with AMI, who consecutively presented to the Emergency Unit and Emergency Intensive Care Unit (EICU) of Beijing Anzhen Hospital from March 12th 2004 to March 11th 2007. According to the time of onset of the disease, all patients were divided into 3 groups: group A (from Mar. 12th 2004 to Mar. 11th 2005), group B (Mar. 12th 2005 to Mar 11th 2006) and group C (Mar. 12th 2006 to Mar. 11th 2007). Clinical characteristics and treatment were compared.


RESULTS
There were significant differences in the number of patients with histories of stroke, coronary artery disease or smoking among the three groups (P < 0.05). No obvious differences in the median of PDT were found among the three groups (P > 0.05). More patients accepted reperfusive therapy in group C compared to group A (P < 0.05), although the mortality rates of AMI among these 3 years were similar.


CONCLUSION
Though more people started to have accepted reperfusion therapy, mortality failed to show an obvious decrease. Subject as how to shorten the PDT called for further study.