Heart valve disease occurs when at least one of the four valves in the heart fails to operate as usual. This can be due to valves allowing blood to leak backward, valves being too narrow, or valves ...

Lung disease is a general term for several disorders that include airway diseases, lung tissue diseases, and lung circulation diseases, some of which may lead to respiratory failure. During the course ...

Doctors categorize Alzheimer’s according to when it develops and which areas of your brain are affected. Researchers are also discovering different cellular patterns that may eventually be used to ...

Amyotrophic lateral sclerosis (ALS) affects the nerve cells in the brain and spinal cord that control muscle movement. Different types of ALS cause symptoms to begin in a certain part of the body and ...

Almost 40% of Americans will receive a cancer diagnosis at some point in their lifetime — but certain types are more common than others, statistics show. USAFacts, a Washington-based nonprofit that ...

Cerebrovascular disease is a group of disorders that affects blood flow and involves at least one blood vessel in the brain. These issues can include blockages or bleeding. There are several types of ...

Valvular heart disease, also called heart valve disease, occurs when you have a diseased or damaged heart valve. When your heart pumps blood, your valves open and close to keep blood flowing in the ...