Implication of preoperative glycosylated hemoglobin level on short term outcomes in diabetic patients undergoing coronary artery bypass grafting

Debmalya Saha, Rakesh Sharma, Lakshmi Sinha, Ahmed Ali, Sunita Chaudhary, Ankit Maheshwari, Muhammad Abid Geelani


Background: Diabetes mellitus is one of the significant risk factors for adverse outcomes after coronary artery bypass surgery. The glycosylated haemoglobin i.e. HbA1c is a reliable diagnostic test to know the long-term glycemic status. The objective of the study is to investigate the implication of preoperative HbA1c level on short term outcomes after coronary artery bypass grafting (CABG).

Method: Total 218 patients were studied, and the data were collected retrospectively. Patients are distributed into group 1 with HbA1c≤7 (good glycemic control) and group 2 with HbA1c>7 (poor glycemic control). The parameters studied for short term outcomes were revision due to bleeding, duration of mechanical ventilation, cerebrovascular accident (CVA), atrial fibrillation (AF), renal failure requiring dialysis, infective complications like sternal and leg wound infection, mediastinitis, pneumonia, urinary tract infection (UTI), sepsis; length of ICU stay and in-hospital mortality.

Result: In comparison to group 1, patients of group 2 showed statistically significant more morbidity in view of short-term outcomes in this study.

Conclusion: HbA1c>7 is associated with statistically significant adverse short-term outcomes after CABG.


HbA1c, Diabetes mellitus, CABG, Outcomes

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