Chinese scientists have shown that acupuncture at Shenmen HE-7 can affect cardiac autonomic neural regulation in healthy subjects. One hundred and twenty subjects were divided into four groups and received four different interventions: verum acupuncture at Shenmen HE-7; non-penetrating sham acupuncture at Shenmen HE-7; verum acupuncture at a sham point; and no acupuncture. Heart rate variability (HRV), which is a measure of the balance between sympathetic and parasympathetic mediators of heart rate, was recorded 10 minutes before, during and after each intervention. The results showed that, compared with sham needling and no acupuncture controls, verum acupuncture at Shenmen HE-7 increased HRV, most likely via stimulation of the the parasympathetic nervous system.
Effect of acupuncture at HT7 on heart rate variability: an exploratory study. Acupunct Med. 2014 Dec 4. pii: acupmed-2013-010441.