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Research Article: Association of lactate detection with in-hospital mortality in critically ill patients with acute myocardial infarction: a retrospective cohort study

Date Published: 2023-04-21

Abstract:
Objectives To assess the associations of lactate level or lactate clearance at different time points with in-hospital mortality in critically ill patients with acute myocardial infarction (AMI). Design A cohort study. Setting The Medical Information Mart for Intensive Care III database. Participant 490 AMI patients. Intervention None. Primary and secondary outcome measures In-hospital mortality of patients. Results In total, 120 (24.49%) patients died at the end of follow-up. After adjusting for confounders, increased risk of in-hospital mortality in patients with AMI was observed in those with high lactate level (24?hours) (HR=1.156, 95%CI: 1.002 to 1.333). Increased lactate clearance (24?hours) was correlated with a decreased risk of in-hospital mortality in patients with AMI (HR=0.995, 95%?CI: 0.994 to 0.997). The area under the curves (AUCs) of lactate level (24?hours) and lactate clearance (24?hours) were 0.689 (95% CI: 0.655 to 0.723) and 0.672 (95% CI: 0.637 to 0.706), respectively. The AUC of lactate level (24?hours) and lactate clearance (24?hours) was higher than lactate level (baseline). Conclusions Increased lactate level (24?hours) was associated with an elevated risk of in-hospital mortality in patients with AMI and increased lactate clearance (24?hours) was correlated with a decreased risk of in-hospital mortality in patients with AMI despite the age and genders.

Introduction:
Acute myocardial infarction (AMI) is a kind of heart disease in cardiology due to the blockage of the coronary arteries. 1 AMI can cause a sudden decline in blood flow, myocardial hypoxia, necrosis, ischaemia and result in complications including chest pain and arrhythmia. 2 The onset of AMI is fast and the disease progresses quickly, and if the treatments are not timely provided, AMI can be life-threatening. 3 Although the introduction of potent platelet inhibitors, 4 improvement in dosing and combinations of…

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