Can be elevated in trauma, rhabdomyolysis, hyperthermia, physical activity, renal or endocrine disease, systemic infections
If patient small with small muscle mass to begin with, total ck may not be elevated- so better to use CK index- is ratio of CKMB/ total CK. Elevated if > 3- 5%.
CK Mass: with monoclonal antibody techniques, can directly measure ck mb mass as mmcg/L. More sensitive for detection of AMI
CK-MB can be removed from the routine ED<unk>  panel without adversely affecting patient care
Cardiac enzymes
Troponin
D-dimer
Brain natriuretic peptide
ECG 
Age adjusted D-dimer
Cardiac ultrasound
Aortic ultrasound