[Study on early fibrinolytic therapy to avoid acute myocardial infarction]

To investigate the frequency of aborted AMI and clinical characteristics of the patients received prompt fibrinolytic therapy.

1120 patients with AMI were divided into two groups, true AMI group and aborted AMI group. Aborted AMI was defined as maximal creatine kinase-MB < or = 2 x upper limit of normal coupled with the presence of resolution of chest pain and 50% of ST-segment deviation within 2 hours after onset of therapy. We compared some characteristic of two groups such as the fibrinolytic time after symptom onset and the frequency of aborted AMI.

The reopening ratio of infarct was 80.5%. 7.1% of the patients escaped myocardial necrosis. Aborted AMI was highest frequency within the first hour (22.0%) than other time groups (P < 0.01); There were no significant differences in the frequency of Aborted AMI in UK group, SK group and rt-PA group (7.0%, 6.7%, 7.1%, P > 0.05); The rate of Killip III/IV, major arrhythmias, angina pectoris and mortality at 30 day in aborted AMI patients compared with those who had true AMI was 3.9% versus 17.1%, 18.0% versus 30.0%, 1.3% versus 8.0%, 0 versus 6.0%, respectively (P < 0.01).

Prompt fibrinolytic therapy improved the likelihood of aborted AMI and clinical outcomes. The frequency of aborted AMI has no relationship with fibrinolytic drug, but closely related to the starting time of treatment from symptom onset.