A 64-year-old man presents 2 months after an anterior ST-elevation myocardial infarction treated with primary PCI. He is clinically stable. Current medications include aspirin 100 mg daily, ticagrelor 90 mg twice daily, atorvastatin 80 mg daily and perindopril 4 mg daily. His blood pressure is 118/70 mmHg and heart rate 72 beats/min. According to guideline-based secondary prevention, which additional class of medication should routinely be considered?