Which test is a marker for ischemic heart disease?

The correct marker for ischemic heart disease among the given choices is Troponin I. Troponin I is a protein found in cardiac muscle that is released into the bloodstream when there is damage to the heart tissue, such as during a myocardial infarction (heart attack). Elevated levels of Troponin I are highly specific for cardiac injury and are commonly used in clinical diagnostics to assess heart damage and assess the presence of ischemic heart disease.

C-reactive protein, while it is a marker of inflammation and can be elevated in various conditions, is less specific for ischemic heart disease specifically. It does not provide direct insight into cardiac muscle injury. Albumin cobalt binding is not a standard test for ischemic heart disease and primarily helps assess various conditions involving hypoalbuminemia. Creatinine kinase can indicate muscle damage but is not specific for cardiac tissue, as it is also released from other muscle types. Therefore, Troponin I is the best choice when indicating ischemic heart disease due to its specificity and relevance in diagnosing cardiac events.