The Radioisotope Renogram compared with Intravenous Pyelography as a Screening Test for Patients with Hypertension

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Abstract
One hundred sixty-two patients with a sustained diastolic pressure of 110 mm of Hg or more were investigated with 131 I renography and intravenous neph-ropyelography, 28 had arteriography, and 16 divided renal function studies. 20%, had abnormalities in both renogram and pyelography and 1 in 3 of these warranted surgical intervention. Bilateral symmetrical renal disease cannot be predicted on renography without simultaneous measurements of blood and bladder concentration. No false negatives were found compared with pyelography in the whole series. Resnography corrected faulty observation and interpretation.