Heart disease is the nation's top killer, and it has been for decades.
In fact, according to government estimates, if all forms of major cardiovascular disease were wiped out, life expectancy would increase by almost 10 years. Here to answer that question and others is Dr. Sidney Smith, past president of the American Heart Association and head of cardiology at the University of North Carolina at Chapel Hill School of Medicine. We will begin the chat with Dr. Smith in about 20 minutes. Dr. Smith is getting ready and will answer questions shortly. One of the problems, we've been able to show that elevated levels of homocysteine are associated with higher incidence of heart disease.