Figure 1.

3D computed-tomography image of the stenotic kidney (left) and renal angiography (right) showing peri-stenosis collateral formation (A, arrows), underscoring its chronic nature. Representative renal angiography from a pig with renal artery stenosis (RAS) showing successful restoration of renal artery patency after revascularization (B). Mean arterial pressure measured by telemetry similarly decreased in pigs with improved or deteriorated STK-GFR after percutaneous transluminal renal angioplasty (PTRA) (C). Single-kidney glomerular filtration rate (GFR) at baseline and 4 weeks after revascularization or sham (D).