Calming Your Nerves and Your Heart Through Meditation

Excerpt:

Medical studies have showed that individuals who practice transcendental meditation daily had lower blood levels of epinephrine, norepinephrine, and cortisol. Transcendental meditation also led to lower respiration rates and heart rate and better blood flow to the brain, indicating less constriction of blood vessels. 

American Journal of Hypertension, 2009 Dec;22(12):1326-31. Epub 2009 Oct 1