Different hospitals have different reference values for testing CRP (C-reactive protein), so the values may vary, but, regardless of the reference value, an elevated CRP often indicates that an inflammatory response is occurring in the body. However, this inflammatory response is not necessarily bacterial inflammation. Therefore, to identify whether an elevated CRP is a bacterial inflammatory response or a sterile inflammatory response, a calcitoninogen test is often added, and an abnormally elevated calcitoninogen test is considered to be primarily the result of a bacterial infection. In cardiology, if a patient has an elevated CRP, the patient is often considered to be in an acute inflammatory response, and if this inflammatory response occurs in a patient with acute myocardial infarction, the inflammation is often aseptic. These pyrogenic sources will lead to an increase in body temperature, mainly a low fever, and a significant increase in CRP produced by the body, which indicates that the body is experiencing sterile inflammation, rather than bacterial infection.