Heart disease is a broad term used to describe diseases that affect the heart's ability to pump blood effectively. There are many types of heart disease, including myocardial infarction (death of heart cells from lack of blood flow), angina pectoris (chest pain from narrowed or blocked arteries), congenital defects (problems with heart structure), heart failure (the heart's inability to pump enough blood), and stroke (blockage or rupture of blood vessels in the brain). To prevent heart disease, one should eat a healthy diet low in saturated fat, exercise regularly, avoid smoking, drink alcohol in moderation, manage stress, and maintain a healthy weight.