Utilizing Circadian Heart Rate Variability Features and Machine Learning for Estimating Left Ventricular Ejection Fraction Levels in Hypertensive Patients: A Composite Multiscale Entropy Analysis. - Zhang, Nanxiang; Pan, Qi; Yang, Shuo; Huang, Leen; Yin, Jianan; Lin, Hai; Huang, Xiang; Ding, Chonglong; Zou, Xinyan; Zheng, Yongjun; Zhang, Jinxin (Biosensors (2079-6374), 2025)