Imaging of Extraanatomic Bypasses

CE MRA also appears useful for surveillance of extra-anatomic bypass grafts. These grafts are typi-

Carotid Subclavian Bypass Anatomy
Fig. 8. MR angiogram of a 37-year old patient with Takayasu disease and stenosis of the right common carotid artery (arrow), occlusion of the left carotid and brachiocephalic arteries (arrow) and stenosis of the right renal artery (asterisk)
Takayasu Disease
Fig. 9. MRA image of a 58 year old patient with reconstruction of the right sublavian artery and the left common carotid artery (arrow) by means of an inverted small bifurcation prothesis

cally made of PTFE or Dacron since vein grafts are not used in the upper extremity. Examples in the upper limbs are carotid-subclavian bypass, reconstruction of innominate and subclavian arteries (Fig. 9) and axilloaxillary bypass. Also, the axillary artery is often used as a source of inflow in patients with lower extremity disease (axillofemoral bypass), who are not candidates for direct aortic reconstruction or in whom angioplasty or stenting has failed (Fig. 10).

Left Axillofemoral Bypass
Fig. 10. Reconstruction of a double station MRA in a patient with an axillofemoral bypass

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  • brancaleone
    What Is Axillofemoral Bypass Surgery?
    8 years ago

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