Some main heart conditions include coronary artery disease, heart attack, atrial fibrillation, congenital heart disease, pericarditis and heart murmurs, as listed by WebMD. Some heart conditions can be minor, such as heart murmurs, while some can be fatal, such as having a heart attack.
Affecting over 13 million Americans, coronary artery disease is the leading cause of death in the United States, according to WebMD. This condition is caused by a build-up of plaque inside coronary arteries. By narrowing the arteries, less oxygen and fewer nutrients are available to supply the heart. Plaque is a hardened collection of cholesterol and cells which, when it ruptures, may cause a heart attack or stroke.