The most critical facet of a biochemical marker of ischemic heart dise
ase is cardiospecificity. This flows from the fact that symptoms and a
lternative objective studies including coronary arteriography and elec
trocardiography are frequently insensitive in detecting coronary arter
y disease. The timely appearance of biochemical evidence of myocyte ne
crosis firmly asserts the presence of life threatening multi-focal cor
onary atherosclerosis which is often not otherwise knowable. Complianc
e in the response of physician and patient clearly depend on the perce
ption of persuasive biochemical testimony.