Baek JY, et al. - Researchers used the Korea Acute Myocardial Infarction Registry to compare the clinical impact of reduced preprocedural thrombolysis in myocardial infarction (TIMI) flows between patients with ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation myocardial infarction (NSTEMI) undergoing percutaneous coronary intervention (PCI). They divided 7,336 AMI patients with angiographically confirmed reduced preprocedural TIMI flow (TIMI 0/1) during PCI into STEMI (n=4,852) and NSTEMI (n=2,484) groups, and compared a 12-month composite of total death, nonfatal myocardial infarction, coronary artery bypass graft, and repeated PCI between the two groups. After 12-months, researchers found that NSTEMI group vs STEMI group had better outcomes and lower incidences of major adverse cardiac events, which could be ascribed to lower total death and repeated PCI in patients with NSTEMI.