The Use of Advanced Glycation End-Product Measurements to Predict Post-Operative Complications After Cardiac Surgery

Abstract

Background/Objectives: Frailty is increasingly recognised as an important contributor to outcomes following cardiac surgery. There are various measures of frailty described, but many include subjective assessments impacting reliability and reproducibility of measurement. A potential biomarker: advanced glycation end products (AGEs) have been suggested to closely correlate with frailty. This may offer the opportunity to objectively measure frailty and have potential use in preoperative risk assessment. The objective and aim of this narrative review is to assess the association between AGEs and outcomes following surgery, in order to evaluate the use of AGEs for preoperative risk assessment. Methods: This review involved searching five databases including the following: MEDLINE (through Ovid), Embase, Cochrane, ClinicalTrials.gov, and a specified Google Scholar search for studies published between database inception and 20 February 2025. The 1142 identified articles were then subjected to various inclusion and exclusion criteria. This exclusion criteria included all articles that were not in the English language, studies involving patients under 18 years of age, and studies that were incomplete or for whom the data was not yet available. This left 11 articles for which a ‘related articles’ search was performed on Google Scholar on 6 March 2025, as per the PRISMA-S extension guidelines, to obtain all relevant articles available. In the end, data analysis was conducted on 13 articles with a total of 2402 participants. These were categorised by type of surgery before analysis was performed for each surgical category. The quality of evidence was assessed using ROBINS-I tool and a risk of bias table has been provided. This study was provided no external sources of funding. Results: Four out of the five studies in cardiac surgery showed a statistically significant association between AGE levels and post-operative complications and outcomes. This association was also seen across thoracic and general surgery. Association was demonstrated with various post-operative complications as well as mortality. These relationships are supported by various pathophysiological mechanisms, including the ability of AGEs to induce oxidative stress, activate inflammatory mediators, and cause endothelial dysfunction. Conclusions: There is a body of evidence supporting the association between AGEs level and cardiac surgical outcomes. This objective measure of frailty could have significant utility in preoperative risk assessment and offer the opportunity to identify patients who will benefit from undergoing prehabilitation.