Thrombolysis in Myocardial Infarction (TIMI) Flow and Myocardial Blush (MB) as Predictors of Left Ventricular Ejection Fraction Improvement in Patients with Acute Myocardial Infarction with ST Segment Elevation Undergoing Primary Percutaneous Coronary Intervention Putu Giani Anabella Bestari Putri*, I Kadek Susila Surya Darma, Ida Bagus Rangga Wibhuti Abstract Background: Reperfusion