Ultrasensitive C-reactive protein, a protein synthesized by the liver, is an important indicator of a number of diseases. If the clinical significance of ultrasensitive C-reactive protein 50mg/L more lies in the following: First, acute inflammatory infection, usually acute respiratory inflammation or acute gastrointestinal inflammation, such as acute community-acquired pneumonia, acute pancreatitis, etc., the ultrasensitive C-reactive protein will be higher than 50mg/L or more. Second, the body is subjected to severe trauma, such as the body is subjected to severe trauma, blows, or surgical procedures caused by the injury will make the body ultrasensitive C-reactive protein will be higher than 50mg / L. Third, heart disease, if there is an acute myocardial infarction, acute heart failure or acute arrhythmia, ultrasensitive C-reactive protein is usually also greater than 50mg / L.