Researchers who used PET found that individuals with coronary heart disease who practiced transcendental meditation in addition to cardiac rehabilitation and those who practiced meditation alone had a 20.7% and 12.8% increase in myocardial blood flow, respectively, compared with a 5.8% increase among those who received cardiac rehab alone and a 10.3% decline among those who received standard treatment. The findings in a nuclear cardiology journal suggest that meditation be considered in heart health programs, but more studies are needed, said study co-author Dr. Robert Schneider.