TECHNETIUM-99M-ETHYLENEDICYSTEINE IN THE DIAGNOSIS AND FOLLOW-UP OF RENOVASCULAR HYPERTENSION

Technetium-99m-ethylenedicysteine (Tc-99m-EC) captopril scintigraphy p erformed in a patient with severe hypertension revealed increased pare nchymal retention in tile left kidney, suggesting renal artery stenosi s, After angiographic confirmation of renal artery stenosis, percutane ous transluminal angioplasty (PTA) was performed on the left renal art ery, Captopril scintigraphy after PTA showed normal findings with no e vidence of parenchymal retention, consistent with reversal to normal k idney functions, In light of this case of renal artery stenosis, it wa s concluded that Tc-99m-EC can be used successfully as a potential ren al agent in the diagnosis and follow-up of renovascular hypertension.