A 62-year-old woman with a history of hypertension and type 2 diabetes presents to a tertiary care centre with acute onset substernal chest pain of 45 minutes duration. She is haemodynamically stable (BP 130/85, HR 92/min). A 12-lead ECG performed at 8 minutes shows ST elevation of 2.5 mm in leads V1–V4 with reciprocal ST depression in II, III, and aVF. Serum troponin I is 0.12 ng/mL. The centre has an active catheterisation laboratory with a door-to-balloon time of 65 minutes. What is the most appropriate next step in management?