It may shock you, but coronary heart disease (CHD) and stroke kill more Americans every year than all cancers combined. There's often a single cause: atherosclerosis, or athero for short. It's the progressive buildup of plaque in your arteries and it’s linked to about 1 in 4 deaths in the US each year. Surf through your arteries on a journey deep inside your body. See how risk factors like high levels of bad cholesterol, smoking, and high blood pressure can help contribute to the buildup of plaque in arteries, also known as atherosclerosis (or "athero"). The Artery Explorer movie reveals the science of the disease like you’ve never seen before.