A 68-year-old patient has pain across the chest, radiating to the neck and arms.

A good way to separate AMI from more typical angina is to look for signs that the pain is more severe, more persistent, and less responsive to the usual triggers and relief measures .

That is why A, D, and F are the best answers here. A patient having an acute myocardial infarction may look pale or gray , which reflects poor perfusion and sympathetic stress during a cardiac event. Chest pain that lasts longer than 10 minutes points away from classic stable angina, which is often brief and improves with rest. And when nitroglycerin gives little or no relief , that raises concern that the problem is more serious than routine angina. The American Heart Association notes that stable angina usually happens with activity or strong emotions and is often treated with rest, medication, or both , while worsening or persistent chest discomfort is more concerning for a heart attack or other serious heart problem. ( www.heart.org )

From an EMT test-taking perspective, B and C sound more like classic stable angina patterns: pain brought on by exertion or stress and pain that improves with rest. Also, while nitroglycerin response by itself is not a perfect diagnostic tool in real-world medicine, NREMT-style questions commonly use poor relief with nitro plus prolonged pain as clues that the patient may be having an AMI rather than angina . Merck also notes that nitroglycerin response alone should not be used to diagnose chest pain, which is why the whole pattern matters. ( Merck Manuals )