Kawasaki disease:
It usually effect children and is also known as Kawasaki sydrome or mucocutaneous lymph node syndrome. It is one of the two leading causes of children's acquired heart disease
"The coronary arteries are most often affected.Part of a coronary wall can be weakened and balloon in an aneurysm. A blood clot can form in this weakened area and block the artery, sometimes leading to a heart attack. The aneurysm can also burst, but this rarely happens. Other changes include inflammation of the heart muscle (myocarditis) or the sac surrounding the heart (pericarditis). Arrhythmias (abnormal heart rhythms) or abnormal functioning of some heart valves also can occur.
Usually all the heart problems go away in five or six weeks, and there's no lasting damage. Sometimes coronary artery damage persists, however.
An arrhythmia or damaged heart muscle can be detected using an electrocardiogram (EKG). An echocardiogram (or "echo") is used to look for possible damage to the heart or coronary arteries."
http://www.americanheart.org/present...dentifier=4634