SERPINE1 and ST Elevation Myocardial Infarction: Collet et al (7) reported the predictive value of PAI-1 antigen level rise (measured at patient presentation and after 24 hours to avoid the influence of circadian variations) and the final flow according to the Thrombolysis in Myocardial Infarction (TIMI) criteria for 30-day mortality of ST-elevation myocardial infarction (STEMI) patients.