A 68-year-old male presents with concern for substernal chest pressure with exertion lasting five minutes and alleviated with rest. He has a remote history of a myocardial infarction (MI). He recently presented with angina symptoms and had a cardiac catheterization which did not reveal any concerning areas of stenosis. He has not been taking his medications. Physical examination shows his pulse is 88 beats/minute, respiration rate is 16 breaths/minute, and blood pressure is 130/80 mmHg. His lungs are clear, heart sounds are normal, and there is no lower-extremity edema. Which of the following is the best treatment to manage the chest pain? A. Angiotensin-converting-enzyme (ACE) inhibitor B. Beta blocker C. Calcium channel blocker D. Low-dose aspirin E. Statin
