Coronary Angiography | |
General Principles | |
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Anatomy & Projection Angles | |
Normal Anatomy | |
Anatomic Variants | |
Projection Angles | |
Epicardial Flow & Myocardial Perfusion | |
Epicardial Flow | |
Myocardial Perfusion | |
Lesion Complexity | |
ACC/AHA Lesion-Specific Classification of the Primary Target Stenosis | |
Lesion Morphology | |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Cafer Zorkun, M.D., Ph.D. [2]; Varun Kumar, M.B.B.S. [3]
Synonyms and keywords: CAA, coronary artery ectasia
Coronary artery aneurysm is an abnormal dilatation of a coronary artery segment over 1.5 times the diameter of normal adjacent segment.[1] An aneurysm can be classified as either saccular (wider than it is long) or fusiform (elongated). Coronary artery aneurysm must be differentiated from coronary artery ectasia; in fact, coronary artery ectasia is a localized arterial dilatation that is graded according to the size of the dilatation in comparison to the normal artery diameter located anywhere in the culprit artery. A coronary artery ectasia is considered as an aneurysm when the coronary artery dilatation is 1.5 times the normal artery diameter located anywhere in the culprit artery.
A localized arterial widening (dilatation) that usually manifests itself as a bulge. Its presence may lead to weakening of the wall and eventual rupture.
None – no ectasia present.
Ectasia – visual assessment of ectasia >1 & < 1.5 times the normal artery diameter located anywhere in the culprit artery.
Aneurysm – visual assessment of an aneurysm > 1.5 times the normal artery diameter located anywhere in the culprit artery.
Shown below are an animated image and a static image depicting an aneurysm in the left coronary artery. Outlined in yellow in the image on the right is the localized aneurysm which is a dilatation of the coronary artery segment >1.5 times the diameter of the adjacent segments on the LCA.
Coronary artery aneurysm has a good prognosis.[8]
It is often found coincidentally on coronary angiography.[8]
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