
A 54-year-old man with a history of type 2 diabetes, hypertension, and coronaryartery disease with angina presents to the physician’s office withchest pain. The pain began 3 hours earlier and is associated with diaphoresisand dyspnea. Examination results are unremarkable, except for diaphoresis.A 12-lead ECG reveals normal sinus rhythm with large R waves and horizontalST-segment depression in leads V1 through V3. The patient is given nitroglycerin,aspirin, heparin, morphine, and a β-blocker for noninfarction acutecardiac ischemia and transferred to the local emergency department (ED).




































































































































































