The patient is a 78 year old Caucasian woman who has a past history of renal artery stenosis and stent placement with severe hypertension. She has been residing in a nursing home where she was noted to have gone without her gastrostomy tube feeds for one week. She was taken to an outside hospital where she was found to have a creatnine of 6.6 mg/dL increased from her baseline of 2.7 mg/dL. She was rehydrated there but her urine output remained very poor so she was transferred to this hospital for a renal angiogram.