Background:In a large number of primary percutaneous coronary intervention patients, angiographic non-reflow and slow flow phenomena are observed in recent developments in interventional equipment and techniques (PCI). In ST-Segment Elevation Myocardial Infarction (STEMI), we have investigated clinical, electrocardiographic preoperative findings that could predict a slow flow / no-reflow in patients treated with PCI, as well as predictor and effect of slow flux / no-reflow during hospital stays and short-term results. Aim:Identifying the pre-procedure, clinical, electrocardiographic findings that may predict a slow flow/no-reflow in PCI-treated STEMI patients and identifying adverse clinical event predictors while in the hospital and the short-term in a slow flow/no-reflow population. Patients and Methods:The study included 72 patients divided into 2 groups, slow-flow / nonreflow group I and normal-flow group II. All were monitored for three months after PCI. Results:RWPT also indicates an important indicator for non-PCI reflow after multivariate analysis QRST has been applied to PCI, before PCI. Our analysis has shown a statistically significant difference in the short-term outcomes after three months between the two groups tested.QRST parameter before and after PCI and RWPT before PCI were statistically significant predictors for short-term impact but there was no statistically significant difference among both studied groups regarding angiographic findings of the lesion. Conclusion:Our study showed that initial coronary patenting is correlated with the immediate post-PCI TIMI flow when angiographic is diagnosed. TIMI baseline 0 grade before primary PCI. Furthermore, no-reflow phenomena pathogenesis is complicated and complex. Given our recent research, patients with no reflux following primary PCI can be classified with simple clinical and angiographical characteristics.R-wave peak time (RWPT) is closely related to the production of NR and a major indicator of adverse clinical conditions in the hospital and follow-up.