Patients with acquired heart disease undergoing angiocardiographic procedures had routine postangiographic abdominal films performed. In fifty-six consecutive cases with clinically unsuspected renal disease, three patients were found to have significant abnormalities. The not infrequent finding of clinically unsuspected renal pathology in patients undergoing angiographic procedures during the evaluation of acquired heart disease has led us to the recommendation that all patients have postangiographic abdominal films. This represents an inexpensive screening test for renal pathology with no increase in patient risk. © 1973.