The purpose of this study was to use intravascular ultrasound (IVUS) to clarify the morphology of @entity574 diagnosed by angiography. Seventy-seven consecutive @entity1 with an @entity384 in a native coronary artery diagnosed by angiography (defined as a lesion lumen diameter 25% larger than reference) were evaluated by IVUS. IVUS true @entity439 were defined as having an intact vessel wall and a maximum lumen area 50% larger than proximal reference. IVUS @entity2849 had a loss of vessel wall integrity and damage to adventitia or perivascular tissue. Complex plaques were lesions with ruptured plaque or spontaneous or unhealed dissection. @entity384 and reference segments were assessed using standard IVUS quantitative techniques. Twenty-one lesions (27%) were classified as true @entity439 , 3 (4%) were classified as @entity2849 , 12 (16%) were complex plaques, and the other 41 (53%) were normal arterial segments adjacent to > or =1 @entity850 . The maximum lumen area within the aneurysmal segment was largest for @entity2849 (35.1 +/- 10.4 mm(2)), 22.1 +/- 9.9 mm(2) for true @entity439 , and similar for complex plaques (11.2 +/- 3.5 mm(2)) and normal segments with adjacent stenoses (13.8 +/- 6.4 mm(2)): analysis of variance, p <0.0001. Only one third of angiographically diagnosed @entity439 had the IVUS appearance of a true or @entity2849 . Instead, most angiographically diagnosed @entity439 had the morphology of complex plaques or normal segments with adjacent stenoses.

An intravascular ultrasound classification of angiographic XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity574 :: ('MESH:D003323', 'Disease') :: ['coronary aneurysms'] @entity384 :: ('MESH:D002311', 'Disease') :: ['aneurysmal dilatation', 'Aneurysmal dilatation'] @entity439 :: ('MESH:D000783', 'Disease') :: ['aneurysms', 'aneurysm'] @entity850 :: ('MESH:D003251', 'Disease') :: ['stenosis'] @entity2849 :: ('MESH:D017541', 'Disease') :: ['pseudoaneurysm', 'pseudoaneurysms']
@entity574 :: (MESH:D003323,Disease) :: ['coronary artery aneurysms']
