Study Population
Patients with STEMI who underwent Primary PCI (p-PCI) in our hospital between February 2014 and December 2017 were included in this retrospective study. Inclusion criteria were as follows: onset of symptoms <6 hours before p-PCI; ST-segment elevation > 0.2 mV in 2 or more contiguous precordial or extremity leads. Left and right coronary angiograms were obtained before the attempted angioplasty. Exclusion criteria were venous graft-related infarcts, non-gradable IRA flow due to technical reasons, concurrent pericardial disease, chronic pulmonary disease, pulmonary hypertension, valvular heart disease (moderate to severe insufficiency and/or stenosis), acute pulmonary embolism, history of cardiac arrest before admission Patients with a history of the previous CAD treated with PCI or coronary artery bypass grafting, malignancy, active infection, and connective tissue disorder were excluded from the study. The patients were divided into two as TIMI 0-1 and TIMI 2-3 according to the IRA patency rate. Of the patients included in this study, 67% were of TIMI flow 0-1 (n = 551), 33% of TIMI flow 2-3 (n=271). Informed consent of each subject’s approval of the Local Ethics Committee with the principles of the Helsinki Declaration was obtained.