Which abnormal value is NOT typically associated with cardiac disease?

Blood urea nitrogen (BUN) is primarily associated with kidney function rather than cardiac disease. It is a waste product formed in the liver when the body breaks down protein, and its levels in the blood can indicate kidney health. In cases of kidney impairment, BUN levels may rise; however, this is not typically a direct indicator of cardiac issues.

While the remaining options—lactate dehydrogenase (LDH), SGOT (also known as AST), and bilirubin—can be influenced by cardiac conditions, particularly in the context of myocardial infarction or heart failure, BUN does not directly correlate with cardiac dysfunction. Elevated levels of LDH and SGOT can reflect tissue damage, including cardiac tissue, and elevated bilirubin may indicate issues such as heart failure that affect liver function. Therefore, BUN stands out among the given values as one that is not primarily associated with cardiac disease.