Ultrasound is widely used for the diagnosis and follow-up of patients with many kinds of vasculitis. Transcutaneous or transesophageal two-dimensional ultrasound images can depict vascular wall lesions associated with vasculitis such as stenosis, aneurysm or wall thickening. Pulsed Doppler and color Doppler are useful for the assessment of stenoses and changes in blood flow. Recent progress in intravascular ultrasound apparatus made it possible to more precisely assess morphological changes in vascular wall. Intravascular ultrasound of a 27-year old male patient suffering from inferior myocardial infarction with right coronary aneurysms revealed calcification and fibrosis of the intima and early development of atherosclerosis in both right and left coronary arteries suggestive of the sequelae of Kawasaki disease.