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Table 1 Classification of coronary artery abnormalities in the acute phase of Kawasaki disease

From: Revised recommendations of the Italian Society of Pediatrics about the general management of Kawasaki disease

No coronary artery involvement: z-score < 2
Dilatation of the coronary artery: z-score > 2 to < 2.5 SD
Small aneurysm of the coronary artery: z-score ≥ 2.5 to < 5 SD
Medium aneurysm of the coronary artery: z-score ≥ 5 to < 10 SD
Giant aneurysm of the coronary artery: z-score ≥ 10 SD