Renal Arteries

Renovascular hypertension and ischemic nephro-pathy have become topics of interest to all en-dovascular specialists with the increasing use of endovascular stent technology to treat these conditions. A study designed to visualize the renal ar-

Renal Artery Disease Treatment
Fig. 7. Abdominal MRA shows left renal artery stenosis (arrow) in a patient with severe aortoiliac disease
Renal Artery Stenosis Mra
Fig. 8. Abdominal MRA shows bilateral renal artery fibromuscular dysplasia (arrows)

teries should include not only the abdominal aorta but also the iliac and femoral arteries bilaterally as these are the approaches used in the treatment of this disease entity.

Many studies have been performed to analyze the utility of MRA in the diagnosis of renal artery stenosis. These studies have shown excellent correlation between CE-MRA and conventional angiography for the diagnosis of renal artery stenosis. Recently studies have shown the benefits of pre-procedure planning with MRA prior to renal artery revascularization [12]. Sharafuddin et al demon strated the improved positive predictive value of a positive diagnosis with the use of CE-MRA. This author also commented on the increased volume of patients referred to his service for revascular-ization due to the use of MRA as a screening tool. He finally reported using significantly less iodinat-ed contrast during the renal intervention due to the anatomic detail supplied by the MRA (Figs. 7, 8) prior to the procedure [13].

The post-procedure follow up of endovascular stents has been limited due to the widespread use of balloon expandable stainless steel stents. Nitinol stents may offer improved visibility for follow up MRA. Several authors have reported preliminary results with MR-compatible stents for the follow up of these patients [ 14,15].This may allow for improved follow up of these patients and hasten reintervention when indicated for in-stent stenosis (Fig. 9).

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Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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