[Renovascular arterial hypertension. Importance of subtraction digital angiography in its diagnosis]. / Hipertensão arterial renovascular. Importância da angiografia digital de subtraccão no seu diagnóstico.

The objective of this study is to contribute to the positioning of the intravenous digital subtraction angiography (IVDSA) in the detection of morphologic abnormalities of renal arteries (RAs), susceptible to originate renovascular hypertension (RVH). The authors focus on the prevalence of RVH in the broad spectrum of systemic arterial hypertension. The definition of RVH is given and its diagnostic criteria are revisited. The angiography methods used in the evaluation of RAs morphologic abnormalities are described.