Prognostic value of ECG heart rate variability parameters in patients with AMI

CHEN Siwei; GU Jianfeng; LUO Qin; LAI Xiaodi; YAN Boyu

Abstract：Objective:To investigate the prognostic value of ECG heart rate variability(HRV)parameters in pa-tients with acute myocardial infarction(AMI).Methods:All 79 patients with AMI admitted to hospital from October 2021 to December 2022 were retrospectively collected and divided into survival group(65 cases)and death group(14 cases)according to their prognosis.All patients received electrocardiogram(ECG)HRV detection,and the case data and examination data were complete.The HRV-related parameters[mean standard deviation between RR intervals(SDANN),root mean square difference between adjacent RR intervals(RMSSD),standard deviation between sinus beats RR intervals(SDNN),total spectrum component of 0～0.40 Hz(TF),low frequency component of 0.14～0.30 Hz(LF)/0.15～0.40 Hz high frequency(HF)were compared between the two groups,the risk value of ECG HRV parameters in predicting poor prognosis in AMI patients was analyzed.Results:The SDANN,RMSSD,SDNN,TF in death group were lower than those in survival group,the LF/HF in death group was higher than it in survival group,and the difference was statistically significant(P＜0.05).Receiver operating characteristic curve(ROC)showed that the area under the curve area under the curve(AUC)of ECG parameters HRV SDANN,RMSSD,SDNN,TF and LF/HF were all＞0.70 in predicting poor prognosis of AMI patients by single detection and combined detection,and the com-bined detection had the highest predictive value.Conclusion:ECG HRV parameters have high prognostic value for AMI patients and can be used as an important prognostic indicator in the future.