<prompt> What is the diagnostic of fresh myocardial infraction in ECGQT interval prolongationP mitraleST segment elevationST segment depression  <response>: Ref Harrison 19 th ed pg 1594 addition to the clinical examination, three major noninvasive tools are used in the evaluation of NSTEMI-ACS: the electrocardiogram ECG, cardiac biomarkers, and stress testing. 