Your Heart: Why It Works & Why It Fails with Dr. Steven Nissen

Despite the fact that heart disease is the No. 1 killer of both men and women in the U.S., there's still a lot of confusion about heart disease symptoms — and exactly how to keep your heart healthy. Steven Nissen, MD, Chair of Cardiovascular Medicine, helps clear up what you need to know. He explains the difference between a heart attack and cardiac arrest (yes, there is one!), what diet's the heart-healthiest, and why walking's so great for your heart.