Validation of the European Multicenter Study on Coronary Artery Bypass Grafting (E-CABG) Bleeding Severity Definition

Area of Science:

• Cardiovascular Surgery
• Critical Care Medicine
• Hematology

Background:

• Assessing perioperative bleeding severity is crucial in cardiac operations.
• Existing classifications may not fully capture the prognostic impact of bleeding.

Purpose of the Study:

• To evaluate the prognostic significance of the novel European multicenter study on Coronary Artery Bypass Grafting (E-CABG) bleeding severity classification.
• To determine the association between bleeding severity grades and adverse clinical outcomes in adult cardiac surgery patients.

Main Methods:

• The E-CABG bleeding severity classification defines 4 grades (0-3) based on blood product transfusion and reoperation for bleeding.
• A cohort of 7,491 patients undergoing coronary artery bypass grafting (CABG), valve operations, or combined procedures was analyzed.
• Statistical analysis assessed the E-CABG classification's predictive power for various adverse events.

Main Results:

• The E-CABG bleeding severity grading method independently predicted in-hospital death, stroke, acute kidney injury, renal replacement therapy, deep sternal wound infection, atrial fibrillation, and prolonged ICU stay.
• The area under the receiver operating characteristic curve for predicting in-hospital death was 0.858.
• In-hospital mortality rates increased significantly with higher bleeding grades (0.2% for grade 0 to 29.0% for grade 3), as did composite adverse events (2.7% to 75.8%).

Conclusions:

• The E-CABG bleeding severity classification is a valuable tool for assessing perioperative bleeding severity in cardiac operations.
• This classification effectively predicts prognosis, including mortality and major adverse events.
• The E-CABG scale aids in risk stratification and clinical decision-making for cardiac surgery patients.