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Atrial fibrillation, or AFib, is a kind of abnormal heart rhythm or arrhythmia. AFib increases the risk for blood clots. These clots can then travel to the brain, causing a stroke. This is why AFib significantly increases the risk for stroke.

Cardiac rehabilitation programs can be conducted while a person is a hospital inpatient or on an outpatient basis.

When the heart or blood vessels near the heart do not develop normally before birth, it's called a congenital heart defect (CHD). Learn about different types of CHDs, and how to help young teens transition successfully from pediatric care to adult care.

The heart is a pump made of muscle tissue. Its pumping action is controlled by electrical impulses.

Barrett esophagus occurs when the normal cells that line your food pipe (esophagus) turn into cells not usually found in your body. The new cells take over because the lining of the esophagus has been damaged. The new, abnormal cells are called specialized columnar cells or intestinal metaplasia.

Diarrhea is when your stools are loose and watery. Read on to learn more about causes and treatments.

Diverticular disease is an infection in the tiny pouches that some people get in their colon. The pouches are called diverticula. These pouches bulge out through weak spots in your colon. The pouches can become inflamed (red, swollen) or infected.

Gastroparesis is a disorder involving your stomach muscles. Learn more about this condition, including cause, risk factors, symptoms, diagnosis, and treatment.

Helicobacter pylori (H. pylori) is a type of bacteria that infects your stomach. Learn more about this infection, including cause, risk factors, symptoms, diagnosis, and treatment.