Pressure gradient measurement to verify hemodynamic results of the chimney endovascular aortic repair (chEVAR) technique.

The application of the described technique seems to be a safe method which allows a direct measurement of renal artery flow hemodynamics before and after chimney implantation during the chEVAR technique. The use of covered balloon expandable stents, ensures the proper blood flow in the renal arteries during the chEVAR technique.