This study is not new, but I didn’t seem to have access to it, so am linking here. 7_Yong_Huang_Presentation
In this study, she looks at LF/HF, RMSSD, and SampEn in a number of patients after treatment with acupuncture. She finds that only SampEn is altered. Because of my recent correspondence with Xavier Bornas who stresses the importance of SampEn as a biomarker, I include this study by Huang. Strangely, she finds that HRV decreases with acupuncture and LF/HF remains unchanged.