Background The “fast track” addition (within 48 hours) of proprotein convertase subtilisin/kexin type 9 inhibitors (PCSK9i) to the oral optimized lipid lowering therapy (LLT) during hospitalization for acute coronary syndrome (ACS) has been shown to rapidly achieve the low-density lipoprotein cholesterol (LDL-C) therapeutic targets. However, so far, its efficacy…