Fig. 1From: Follow-up of iatrogenic aorto-coronary "Dunning" dissections by cardiac computed tomography imagingClassification of aortocoronary dissection based upon the extent of aortic involvement according to Dunning et al. [2] Class I (left), involves only the coronary cusp. Class II (middle), extends up the aortic wall, but remains under 40 mm. Class III (right), contrast media extends over 40 mm up to the aortic wallBack to article page