Search Health Topics A-Z
Acute Respiratory Distress Syndrome
Acute Respiratory Distress Syndrome (ARDS) is a serious lung condition that causes low blood oxygen levels.
Alpha-1 Antitrypsin Deficiency
Alpha-1 antitrypsin deficiency is an inherited condition in which the body does not make enough of a protein called alpha-1 antitrypsin. This raises the risk of lung diseases such as COPD.
Anemia is a condition in which the blood has a lower-than-normal amount of healthy red blood cells.
Angina (Chest Pain)
Angina is chest pain or discomfort that happens when an area of the heart does not get enough oxygen-rich blood. It is a common symptom of heart disease.
Antiphospholipid Syndrome (APS)
Antiphospholipid syndrome (APS) is an autoimmune condition that causes abnormal blood clots to form in the blood vessels.
Aortic aneurysms are balloon-like bulges that occur in the aorta, which carries blood from your heart to the rest of your body. An aneurysm that bursts is a medical emergency.
Aplastic anemia is a condition in which bone marrow does not make enough new blood cells for the body’s needs.
An arrhythmia, or irregular heartbeat, is a problem with the rate or rhythm of your heartbeat. Your heart may beat too quickly, too slowly, or with an irregular rhythm.