This is a national registry study to determine the serumal biomarkers for prognosis of adverse events in patients undergoing coronary artery bypass grafting.

Inclusion Criteria:

1. Subject undergoing coronary artery bypass grafting;
2. Age is more than 18 and less than 80 years old;
3. Male and non pregnancy female;
4. Subject who understands study requirements and agrees to sign an informed consent from prior to study procedures.

Exclusion Criteria:

1. Pregnancy female;
2. Participate in other clinical trial in the last 1 month.
3. Subject who doesn't agree to sign an informed consent from prior to study procedures.
4. Subject undergoing repeat CABG, concomitant valve or other cardiac surgery.

Group consists of patients who underwent coronary artery bypass grafting in Beijing Anzhen Hospital.