Clinical Research Directory

Inclusion Criteria: \---- Age \> 18 and ≤ 80 years old \- Patients with acute STEMI within 12 hours of symptom onset who are planned to receive PPCI Exclusion Criteria: * Prior revascularization * Known allergy to gadopentetate dimeglumine contrast agent * Pregnancy or planned pregnancy within the next 6 months * Life expectancy \< 1 year * Metallic implants or claustrophobia that precluded MRI * Severe COPD or inability to hold breath for MRI * Severe hepatic or renal dysfunction (ALT \> 5×ULN or eGFR \< 15 mL/min/1.73 m²)