Stress and other negative emotions contribute to about 25 percent of heart attacks. But recent cutting-edge research shows that positive emotions can cause a chemical change in your body that directly improves your overall cardiovascular health. Dr. Maurice Pickard welcomes Dr. Michael Miller to discuss his book, Heal Your Heart: The Positive Emotions Prescription to Prevent and Reverse Heart Disease. Dr. Miller is a Professor of Cardiovascular Medicine, Epidemiology, and Public Health at the University of Maryland School of Mediicne and is the Director of the Center of Preventive Cardiology.