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Angina
Learn about a type of chest pain caused by reduced blood flow to the heart. This chest pain is a symptom of heart disease.
Angina treatment: Stents, drugs, lifestyle changes — What's best?
Confused about which angina treatment — stents, medicine or lifestyle changes — to choose? Find out more.
Anthrax
Learn about the symptoms and risks of anthrax, a rare but deadly bacterial disease that's been used in bioterrorism.
Antibiotic-associated diarrhea
Learn more about why you might get diarrhea while taking antibiotics, as well as how to treat or prevent this uncomfortable and sometimes serious problem.
Antibiotics: Are you misusing them?
The overuse of antibiotics creates antibiotic-resistant germs. Protect yourself and others by using antibiotics wisely.
Aortic valve repair and aortic valve replacement
These types of heart valve surgeries are done to treat aortic valve disease, including aortic stenosis and aortic regurgitation.
Aphasia
Some conditions, including stroke or head injury, can seriously affect a person's ability to communicate. Learn about this communication disorder and its care.
Aplastic anemia
Your body stops producing enough new blood cells in this rare and serious condition, possibly causing fatigue, higher risk of infections and uncontrolled bleeding.
Appendicitis
Is it just a bellyache or something more serious? Find out about the symptoms and treatment for inflammation of the appendix.
Arteriovenous fistula
Irregular connections between arteries and veins may cause certain complications. Learn more about the causes and possible treatment options.
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