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Heart Conditions

A to Z: Atresia

Learn about congenital defects and conditions that affect vessels, valves, and passages in the heart and other organs.

Aortic Stenosis

Aortic stenosis means the aortic valve is too small, narrow, or stiff. Many people have no symptoms, but kids with more severe cases will need surgery so that blood flows properly through the body.

Cardiac Catheterization

This minimally invasive procedure helps doctors perform diagnostic tests on the heart and even treat some heart conditions.

Heart and Circulatory System

The heart and circulatory system are our body's lifeline, delivering blood to the body's tissues. Brush up on your ticker with this body basics article.

Hypoplastic Left Heart Syndrome (HLHS)

Hypoplastic left heart syndrome (HLHS) is a birth defect of a baby’s heart. The left side of the heart doesn’t grow as it should, making it smaller and weaker than normal.

Quick Summary: Hypoplastic Left Heart Syndrome (HLHS)

Hypoplastic left heart syndrome (HLHS) is a problem that happens when the left side of a baby’s heart doesn't form as it should. It’s smaller than normal and can’t pump enough blood to the body. After the baby is born, doctors can treat the problem with medicines and several surgeries.

Single Ventricle Defects

Usually, a heart has two working ventricles (pumping chambers). Having a single ventricle means that only one of the two ventricles works well enough to pump blood.