• Jungchan Park, Ah Ran Oh, Seung-Hwa Lee, Jong-Hwan Lee, Jeong Jin Min, Ji-Hye Kwon, Jihoon Kim, Kwangmo Yang, Jin-Ho Choi, Sang-Chol Lee, Hyeon-Cheol Gwon, Kyunga Kim, Joonghyun Ahn, and Sangmin Maria Lee.
• Department of Anesthesiology and Pain Medicine Samsung Medical CenterSungkyunkwan University School of Medicine Seoul Korea.
• J Am Heart Assoc. 2021 Apr 6; 10 (7): e019216.

AbstractBackground Perioperative blood glucose level has shown an association with postoperative outcomes. We compared the incidences of myocardial injury after noncardiac surgery (MINS) and 30-day mortality, according to preoperative blood glucose and hemoglobin A1c (HbA1c) levels. Methods and Results The patients were divided according to blood glucose level within 1 day before surgery. The hyperglycemia group was defined with fasting glucose >140 mg/dL or random glucose >180 mg/dL. In addition, we compared the outcomes according to HbA1c >6.5% among patients with available HbA1c within 3 months before surgery. The primary outcome was MINS, and 30-day mortality was also compared. A total of 12 304 patients were enrolled and divided into 2 groups: 8324 (67.7%) in the normal group and 3980 (32.3%) in the hyperglycemia group. After adjustment with inverse probability of weighting, the hyperglycemia group exhibited significantly higher incidences of MINS and 30-day mortality (18.7% versus 27.6%; odds ratio, 1.29; 95% CI, 1.18-1.42; P<0.001; and 2.0% versus 5.1%; hazard ratio, 2.00; 95% CI, 1.61-2.49; P<0.001, respectively). In contrast to blood glucose, HbA1c was not associated with MINS or 30-day mortality. Conclusions Preoperative hyperglycemia was associated with MINS and 30-day mortality, whereas HbA1c was not. Immediate glucose control may be more crucial than long-term glucose control in patients undergoing noncardiac surgery. Registration URL: https://www.cris.nih.go.kr; Unique identifier: KCT0004244.

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