Abstract
Abstract Renovascular hypertension is the most common cause of secondary hypertension. Imaging plays an important role in establishing the diagnosis in these cases. Digital subtraction angiography (DSA) is the gold standard investigation in suspected cases. Colour Doppler Ultrasound (CDUS) is a very effective and cheap screening tool. CT angiography and MR angiography are effective and comparable alternatives to DSA. Captopril scintigraphy and renal vein renin sampling are used in selected patients in whom the functional significance of the renal artery stenosis is to be determined.
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