<prompt> A patient presents with 12 hours following a myocardial infraction . Test of choiceLactate dehydrogenaseCardiac troponinsCreatinine phosphokinaseMyoglobin  <response>: Ref Harrison 19 th ed pg 1594 In 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. CCTA is an additional emerging option Fig. 294-2. The goals are to: 1 recognize or exclude myocardial infarction MI using cardiac biomarkers, preferably cTn; 