Kawasaki disease is a childhood disease usually affects children less than 5 years of age and is the number one cause of acquired heart disease in children. Kawasaki disease is a form of vasculitis, which means inflammation of blood vessels. This inflammation can cause redness and irritation in many tissues of the body, including the hands, feet, whites of the eyes, mouth, lips and throat. This inflammation can also target the coronary arteries, the blood vessels that feed the heart muscle itself.
If Kawasaki Disease is not treated, 25% of patients develop coronary artery dilation or coronary artery aneurysms. The heart-related complications caused by this inflammation can last a short time or may be long-term, depending on how much damage to the heart occurs.