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  • Your Heart & Circulatory System for Kids

    Your heart is a hard-working muscle. Find out more in this article for kids.

  • Heart and Circulatory System for Parents

    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.

  • Heart and Circulatory System for Teens

    The heart and circulatory system (also called the cardiovascular system) make up the network that delivers blood to the body's tissues.

  • Arrhythmias for Parents

    Arrhythmias are abnormal heart rhythms usually caused by an electrical "short circuit" in the heart. Many are minor and not a health threat, but some can indicate a more serious problem.

  • Atrial Septal Defect for Teens

    Atrial septal defect, or ASD, is a heart defect that some people are born with. Most ASDs are diagnosed and treated successfully with few or no complications.

  • Coarctation of the Aorta for Parents

    Coarctation of the aorta (COA) is a narrowing of the aorta, the major blood vessel that carries blood away from the heart to the body.

  • E-Cigarettes for Parents

    E-cigarettes are marketed as a safe alternative to smoking, but they're not - they still deliver nicotine into the body. Here are the facts on "vaping."

  • E-Cigarettes for Teens

    E-cigarettes aren't a safe alternative to smoking, they're just another way of putting nicotine into your body. Get the facts on e-cigs and vaping.

  • Tetralogy of Fallot (TOF) for Parents

    Tetralogy of Fallot (TOF) is a combination of problems caused by a birth defect that changes the way blood flows through the heart.

  • Patent Foramen Ovale (PFO) for Parents

    The foramen ovale is a normal opening between the upper two chambers of an unborn baby’s heart. It usually closes soon after the baby’s birth — when it doesn't, it's called a patent foramen ovale.