Intravenous urography in investigation of hypertension.

Eighty intravenous pyelograms, carried out as part of the routine investigation of hypertension, revealed only one unsuspected renal lesion of possible relevance to the long-term management. Such a low therapeutic return, in the light of its cost and not entirely negligible risk, raises doubts about the place of excretion urography amongst the screening tests aimed at discovering tractable underlying causes of hypertension.