Ather Ali, Dr. David L. Katz and Michael B. Bracken of Yale University conducted a systematic review to assess the efficacy of mind-body therapies -- mediation, yoga and visualization -- versus placebo or active control in the treatment of hypertension.

The review found mind-body therapies significantly reduced systolic blood pressure by a mean 11.52 mm Hg and diastolic blood pressure by 6.83 mm Hg. Significant results were seen in systolic blood pressure reductions by yoga and meditation therapy, while only yoga therapies demonstrated significant reductions in diastolic blood pressure.

"This review shows that there is some high quality scientific literature supporting the use of mind-body therapies as a treatment for hypertension, and the magnitude of effect is clinically significant," Ali said in a statement.

Ali presented the findings at the 22nd annual meeting of the American Association of Naturopathic Physicians in Palm Springs, Calif.