Risk Factors for Myocardial Injury During Cardio-Pulmonary Bypass-Assisted Heart Surgery: A Retrospective Single-Center Study
Abstract
Introduction: Myocardial injury is a significant contributor to 30-day mortality after cardiac surgery with cardiopulmonary bypass. We aimed to investigate the association between mean arterial pressure, norepinephrine use during the aorta cross-clamp period, and aorta cross-clamp duration with myocardial injury during cardiopulmonary bypass-assisted open-heart surgery.
Method: We identified all adults (≥ 18 years) undergoing coronary artery bypass grafting on cardiopulmonary bypass at Rigshospitalet, Copenhagen, between January 1st 2018 and December 31st 2019. The primary outcome was the change from baseline in creatine kinase myocardial band during the first 18 postoperative hours. Exposures included mean arterial pressure, norepinephrine use during the aorta cross-clamp period, and aorta cross-clamp duration. Associations were investigated using linear mixed-effect models.
Results: A total of 1443 patients were included in the analysis. Patients treated with norepinephrine during the aortic cross-clamp period had 19% (95% CI: 9.0%-29%; p < 0.001) higher creatine kinase myocardial band postoperatively compared with those not treated with norepinephrine. Higher mean arterial pressure was not significantly associated with creatine kinase myocardial band (3.0%, 95% CI: -2.0% to 9%; p = 0.20). Patients treated with norepinephrine with a mean arterial pressure above the median (39 mmHg) had similar creatine kinase myocardial band levels compared to patients not treated with…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 1,443 participants or records.
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