Answer:
The next best step wold be to get an ECG and cardiac markers.
Explanation:
When any patient especially those with a history of hyperlipidemia or diabetes present with cardiac symptoms (e.g crushing central chest pain radiating to jaw or arm, SOB, Sweating etc), the next best step is always an ECG. If there are changes on the ECG (e.g ST elevations or depressions), the next best step is to get cardiac markers.Since unstable angina falls under Acute coronary syndrome, the only way you can confirm whether it is an active myocardial infarction or not is to through cardiac markers.
