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Autism treatment: Can chelation therapy help?
Chelation therapy is not an effective autism treatment, and it may be dangerous.
Autism spectrum disorder treatment: Can special diets help?
There's no evidence that restrictive diets are an effective treatment for autism spectrum disorder.
Atrioventricular canal defect
This congenital heart defect involves a hole in the heart. It affects blood flow through the heart valves. Learn the symptoms and how it's treated.
Atrial tachycardia
This type of fast heartbeat may occur after heart surgery or during pregnancy. But infections may trigger it, too. Learn how it's diagnosed and treated.
Atrial septal defect (ASD)
This heart problem that is present at birth causes a hole between the heart's upper chambers. It can be treated.
Ataxia
Often caused by an underlying condition, this loss of muscle control and coordination can impact movement, speech and swallowing.
Astigmatism
Imperfect curvature of your eye can cause blurred distance and near vision. Learn about this common and treatable eye condition.
Asthma and acid reflux: Are they linked?
A Mayo Clinic expert discusses how acid reflux can make asthma worse.
Ascariasis
Learn more about the causes, treatment and prevention of this roundworm infection.
Arteriovenous malformation
In this condition, a tangle of blood vessels affects the flow of blood and oxygen. Treatment can help.
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