Class I | No abnormality of coronary arteries in the various phases of the disease |
Class II | Transient coronary artery ectasia that disappears within 8Â weeks |
Class III | Single aneurysm of small-medium caliber between + 3 and + 7 SD in one or more arteries |
Class IV | One or more aneurysms ≥7 SD, including multiple and complex giant aneurysms without any obstruction |
Class V | Coronary artery obstruction at the angiography |