Search Health Topics A-Z
A
Asthma
Asthma is a long-term condition in which the airways become inflamed and narrowed at times. This makes it hard to breathe.
Atherosclerosis
Atherosclerosis is a condition in which a sticky substance called plaque builds up in the arteries. This causes the arteries to narrow and can reduce blood flow through the body.
Atrial Fibrillation
Atrial fibrillation, also known as A-fib or AF, is a condition in which the heart’s upper and lower chambers do not work together as they should. This can cause your heartbeat to be too fast, too slow, or irregular.
B
Bleeding Disorders
Bleeding disorders are rare disorders affecting the way the body makes blood clots. If you have a bleeding disorder, you may have problems with bleeding too much after an injury or surgery.
Blood Cholesterol
Cholesterol is a waxy, fat-like substance the body needs for good health but in the right amounts. Unhealthy levels of cholesterol can lead to heart and blood vessel diseases.
Blood Clotting Disorders
Blood clotting disorders are problems with how the body makes blood clots. If you have a clotting disorder, your blood may not clot enough when you are injured, or your blood may form clots even without an injury.
Blood Tests
Blood tests help doctors check for certain diseases and conditions. They also help check how well organs such as the heart are working and whether treatments are helping.
Bronchiectasis
Bronchiectasis is caused by damage to the airways in the lungs. The damage makes it hard to clear mucus from the airways, which can lead to frequent serious lung infections.