Permanently Decreased Renal Blood Flow and Hypertension after Lithotripsy

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Abstract
To the Editor: In a recent study of the long-term complications of extracorporeal shock-wave lithotripsy (ESWL), we found decreased blood flow of the treated kidney and hypertension (systolic blood pressure ≥ 150 mm Hg, diastolic blood pressure ≥ 90, or both)1 in 5 of 21 patients 18 months after treatment. Thus, ESWL may cause major renal trauma,2 and such trauma may induce renovascular hypertension. Because there may be a long interval between renal injury and the onset of hypertension,3 we attempted to determine whether the decreases in the blood flow of the treated kidneys and the increases in blood pressure . . .