Increasing serum miR-409-3p predicts the major adverse cardiac adverse events in elderly patients after hip fracture surgery

Background Major adverse cardiovascular events (MACE) are critical complications responsible for the morbidity and mortality of elderly hip fracture patients. There was an urgent need to explore an effect biomarker for predicting MACE in elderly patients receiving hip fracture surgery. Objective This study focused on an age-related miRNA, miR-409-3p, and assessed its significance in elderly hip fracture patients. Methods A total of 267 hip fracture patients were enrolled in this study including 104 elderly patients (age [greater than or equal to] 60 years). All patients were followed up for 1 year to monitor the occurrence of MACE. The risk factors for the occurrence of MACE were evaluated by the logistic regression analysis. Results Elderly age and reduced cardiac and renal function were identified as risk factors for MACE in hip fracture patients. Elderly patients also showed a high incidence of MACE. In elderly hip fracture patients, significant upregulation of miR-409-3p was observed, which was associated with patients' elderly age, higher level of revised cardiac risk index (RCRI), lower left ventricular ejection fraction (LVEF), and higher levels of N-terminal pro-brain natriuretic peptide (NT-proBNP), creatine kinase-MB (CK-MB), and high sensitivity troponin I (hsTnI). Additionally, miR-409-3p was identified as an independent factor for the MACE in elderly patients received hip fracture surgery. Conclusion Upregulated miR-409-3p was an age-related miRNA and could predict the occurrence of MACE in elderly hip fracture patients. Keywords: Hip fracture repair surgery, Postoperative complication, Cardiac and renal function, Major adverse cardiovascular disease