A 58-year-old man with hypertension and hyperlipidemia presents to the ED with 45 minutes of crushing substernal chest pain radiating to the left arm associated with diaphoresis and nausea. He took 1 sublingual nitroglycerin tablet at home without relief. On arrival, he is anxious and pale. Temperature is 37.0°C (98.6°F), BP is 152/92 mmHg, HR is 96/min, RR is 18/min, and SpO2 is 95% on room air. ECG shows 2-mm ST-segment elevations in leads II, III, and aVF. Initial troponin is pending. Which of the following is the most important definitive treatment to reduce myocardial necrosis and mortality in this patient?

(Assume the hospital has immediate capability for catheterization.)