Background: Acupuncture at speciﬁc acupoints has experimentally been found to reduce chronically elevated blood pressure. Objective: To examine effectiveness of electroacupuncture (EA) at select acupoints to reduce systolic blood pressure (SBP) and diastolic blood pressures (DBP) in hypertensive patients.
Design: Two-arm parallel study. Patients: Sixty-ﬁve hypertensive patients not receiving medication were assigned randomly to one of the two acupuncture intervention (33 versus 32 patients). Intervention: Patients were assessed with 24-hour ambulatory blood pressure monitoring. They were treated with 30-minutes of EA at PC 5-6+ST 36-37 or LI 6-7+GB 37-39 once weekly for 8 weeks. Four acupuncturists provided single-blinded treatment.
Main outcome measures: Primary outcomes measuring effectiveness of EA were peak and average SBP and DBP. Secondary outcomes examined underlying mechanisms of acupuncture with plasma norepinephrine, renin, and aldosterone before and after 8 weeks of treatment. Outcomes were obtained by double-blinded evaluation.
Results: After 8 weeks, 33 patients treated with EA at PC 5-6+ST 36-37 had decreased peak and average SBP and DBP, compared with 32 patients treated with EA at LI 6-7+GB 37-39 control acupoints. Changes in blood pressures signiﬁcantly differed between the two patient groups. In 14 patients, a long-lasting blood pressure– lowering acupuncture effect was observed for an additional 4 weeks of EA at PC 5-6+ST 36-37. After treatment, the plasma concentration of norepinephrine, which was initially elevated, was decreased by 41%; likewise, renin was decreased by 67% and aldosterone by 22%.
Conclusions: EA at select acupoints reduces blood pressure. Sympathetic and renin-aldosterone systems were likely related to the long-lasting EA actions.
Author: Peng Li, MD, 1 Stephanie C. Tjen-A-Looi, PhD, 1 Ling Cheng, MD,2 Dongmei Liu, MD, 1 Jeannette Painovich, DAOM, 1 Sivarama Vinjamury, MAOM,3 and John C. Longhurst, MD, PhD1
Quelle: MEDICAL ACUPUNCTURE Volume 27, Number 4, 2015 DOI: 10.1089/acu.2015.1106