A 52-year-old male from rural Maharashtra with no prior medical history presents to a primary health centre with chest discomfort for 2 hours. He is conscious, BP 145/92 mmHg, HR 88/min, RR 18/min. No dyspnoea. Physical examination is unremarkable. The health worker performs a 12-lead ECG which shows ST elevation in leads II, III, aVF. The nearest PCI-capable centre is 120 km away (3–4 hours by road). What is the most appropriate immediate next step?