Objectives: To determine whether coronary artery lesions (ectasia and aneurysm) are commonly observed on the initial echocardiogram of patients with acute Kawasaki syndrome, whether coronary artery ectasia and/or aneurysms occur more frequently in patients with incomplete Kawasaki syndrome than in those patients with complete findings, and whether earlier diagnosis and treatment of Kawasaki syndrome are associated with less frequent occurrence of coronary artery ectasia and/or aneurysm. Design:

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... A retrospective medical record review. Setting: A tertiary care pediatric hospital. Participants: One hundred patients treated for Kawasaki syndrome between July 1, 1998, and June 30, 2003, who were identified by a medical record search. Main Outcome Measure: Prevalence of coronary artery lesions (ectasia and aneurysm) on the initial and subsequent echocardiograms.