De Ritis Ratio as Major Adverse Cardiovascular Events Predictor Up to 30 Days After Hospital Discharge in Acute Myocardial Infarction Patients Undergoing Percutaneous Coronary Intervention Primanto Tantiono*, I Kadek Susila Surya Darma, Hendy Wirawan Abstract Background: Aspartate aminotransferase (AST) and alanine transaminase (ALT) are commonly used to assess liver function,