Heart disease describes a range of conditions that affect your heart. Diseases under the heart disease umbrella include blood vessel diseases, such as coronary artery disease; heart rhythm problems (arrhythmias); and heart defects you’re born with (congenital heart defects), among others.

A heart transplant is an operation in which a diseased, failing heart is replaced with a healthier donor heart. Heart transplant is a treatment that’s usually reserved for people whose condition hasn’t improved enough with medications or other surgeries

Hepatitis refers to an inflammatory condition of the liver. It’s commonly caused by a viral infection, but there are other possible causes of hepatitis. These include autoimmune hepatitis and hepatitis that occurs as a secondary result of medications, drugs, toxins, and alcohol.

Also called: human immunodeficiency virus, acquired immunodeficiency syndrome.