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Arrhythmias in Children What are arrhythmias in children? An arrhythmia is an abnormal heart rhythm. When a child has an arrhythmia, abnormal electrical signals sent through the heart muscle may cause the heart to beat too fast (tachycardia), too slow (bradycardia), or in an

Aortic Stenosis in Children What is aortic stenosis in children? Aortic stenosis means that your child has a heart valve that is too narrow or is blocked. The aortic valve is 1 of 4 heart valves that keep blood flowing through the heart. The valves make sure blood flows in only

The Child's Immune System What is the immune system? The immune system protects your child's body from outside invaders. This includes germs, such as bacteria, viruses, and fungi, and toxins (chemicals made by microbes). The immune system is made up of different organs, cells

X-Linked Agammaglobulinemia in Children What is X-linked agammaglobulinemia in children? X-linked agammaglobulinemia is a rare genetic disease. It causes a weakened immune system. It is also known as Bruton's agammaglobulinemia. X-linked means that the gene that causes this

Allergy There are many things to consider when a child is affected by allergies. Listed in the directory below are some of these considerations, for which we have provided a brief overview. All About Allergy Types of Allergens Symptomatic Conditions of Allergy Diagnostic

Anaphylaxis in Children What is anaphylaxis in children? Anaphylaxis is a severe, life-threatening reaction to an allergen. An allergen is something that your child is allergic to. Anaphylaxis is a medical emergency. Your child can have a reaction to an allergen within seconds or

Atopic Dermatitis in Children What is atopic dermatitis in children? Atopic dermatitis is a long-term (chronic) skin condition. It causes red, dry, itchy, scaly skin. It’s a very common condition in babies and children. It usually first appears between ages 3 and 6 months. What

Contact Dermatitis in Children What is contact dermatitis in children? Contact dermatitis is a skin reaction from contact with certain substances. The substances may be: Irritants. These cause direct skin irritation and inflammation. They are the most common cause of contact

Common Variable Immunodeficiency in Children What is common variable immunodeficiency in children? Common variable immunodeficiency (CVID) is an immunodeficiency problem that causes a child to have a low level of antibodies and a decreased responsiveness to some vaccines. This

22q11.2 Deletion Syndrome in Children What is 22q11.2 deletion syndrome in children? The 22q11.2 deletion syndrome (22q11.2DS) is a genetic disorder. In children with this syndrome, a tiny piece of chromosome 22 is missing. This can cause many health problems. These problems may