Intravascular ultrasound detects coarctation of the renal artery in a patient with moyamoya disease

A 19-year-old man with moyamoya disease was diagnosed as having renovascula r hypertension, based on stenosis of the proximal portion of the right rena l artery with elevated plasma renin activity. Intravascular ultrasound (IVU S) imaging st the renal artery lesion revealed focal narrowing of the renal artery without vascular wall thickening (i.e., coarctation), The coarctati on of the renal artery was adequately dilated by stent implantation after s uboptimal balloon angioplasty, After the procedure, the patient's hypertens ion improved. The findings of the present case suggest that IVUS-guided ren al angioplasty is an effective therapeutic procedure for correcting coarcta tion of the renal artery in patients with moyamoya disease.