Terlecki M, Wojciechowska W, Dudek D, et al. - Researchers used the Polish National Registry to assess the clinical as well as angiographic phenotype and result of non-ST-segment elevation myocardial infarction (NSTEMI) patients with total occlusion (TO) (NSTEMI _TO ) vs NSTEMI patients without TO (NSTEMI _NTO ) and those with ST-segment elevation and TO (STEMI _TO ). They analyzed relevant data of patients with acute myocardial infarction who had percutaneous coronary intervention (PCI) between 2014 and 2017. In terms of mean age, Killip class IV on admission, cardiac arrest before admission and death during PCI, intermediate outcomes were seen in the NSTEMI _TO group vs the NSTEMI _NTO and STEMI _TO groups. According to findings, an obvious difference existed between the NSTEMI _TO group and NSTEMI _NTO group. NSTEMI _TO seemed to be an intermediate condition between NSTEMI _NTO and STEMI _TO , although the longest time delay to as well as the worst outcome of PCI were found in NSTEMI _TO patients, which can be explained by the location of the culprit lesion in the left circumflex artery.