A 66-year-old male is evaluated in the emergency department for chest pain and dyspnea. Three days agohe experienced the sudden onset of substernal chest pain. His symptoms waxed and waned over a period of 3 hours and then spontaneously subsided. An electrocardiogram (ECG) demonstrates significant Q waves in inferolateral leads and elevated ST segments. What is the most likely diagnosis?
a) Non-ST elevation myocardial infarction (NSTEMI)
b) Stable angina
c) Unstable angina
d) ST elevation myocardial infarction (STEMI)
