What causes a heart attack and how can we prevent one?  Dr. James Alderman, director of the Interventional Cardiology program at MetroWest Medical Center and Donny Parlin, chief technician of the cardiac lab, discusses the signs and symptoms of coronary heart disease, the role of coronary stenting and when to call the doctor. Learn what atherosclerosis is and how it can affect the blood vessels of your heart. See how doctors diagnose the cause of cardiac chest pain and what can be done to prevent heart damage. Watch as a patient is taken for cardiac catheterization, see the entire procedure as it is being performed and look at the vessels of the heart along with the doctors as they study a patient with chest pain.