<unk>  become threatening to the health of the organism when growth of the false lumen prevents perfusion of the true lumen and the end organs perfused by the true lumen. For example, in an aortic<unk>  if the left subclavian artery orifice were distal to the origin of the<unk>  then the left subclavian would be said to be perfused by the false lumen, while the left common carotid (and its end organ, the left hemisphere of the brain) if proximal to the<unk>  would be perfused by the true lumen proximal to the<unk>  MRI of an aortic<unk>  Aorta descendens with<unk>  Aorta isthmus Vessels and organs that are perfused from a false lumen may be well-perfused to varying degrees, from normal perfusion to no perfusion. In some cases, little to no end-organ damage or failure may be seen. Similarly, vessels and organs perfused from the true lumen but distal to the<unk> may be perfused to varying degrees. In the above example, if the aortic<unk> extended from proximal to the left subclavian artery takeoff to the mid descending aorta, the common iliac arteries would be perfused from the true lumen distal to the<unk> but would be at risk for malperfusion due to occlusion of the true lumen of the aorta by the false lumen.
Dissection 
Effacement 
Abutment 
Disarticulation
Prolapse
Fixation 
ConFusion
Exfoliation 