Researchers in the USA have done a 2-decade long study looking to see if acupuncture can lower blood pressure. They found that acupuncture has the potential to regulate cardiovascular function in patients with diseases such as hypertension. This is great news and fits with what we acupuncturists already know!
http://www.jcm.co.uk/research-archive/article/acupuncture-regulation-of-blood-pressure-2596/