Background: Among patients with ST-segment Elevation Myocardial Infarction (STEMI) undergoing primary Percutaneous Coronary Intervention (PCI), worsening of renal function resulting in Acute Kidney Injury (AKI) is a frequent complication known to be associated with adverse outcomes. Also, anemia on admission is associated with an increased risk for (AKI). The relation between echocardiographic parameters of Left Ventricular (LV) function and the risk of AKI among patients with STEMI undergoing PCI is still controversial. Aim of the Study: Detection of the relationship between hemoglobin level and LV systolic and diastolic function as a predictors for developing AKI after primary PCI in patients with STEMI.