A YOUNG MAN WITH ACUTE-RENAL-FAILURE AND SEVERE LOIN PAIN

The first case of exercise-induced acute renal failure (EIARF) is repo rted measuring the blood flow and arterial resistance in the kidney by pulsed Doppler ultrasound. A 20-year-old Japanese male suffered from severe loin pain and non-oliguric acute renal failure after strenuous exercise, Serum myoglobin and creatine phosphokinase were normal and u rinary myoglobin was not detectable. The Doppler pattern in several se gmental arteries showed a slow end-diastolic velocity (EV) and a high resistance index (RI), indicating increased renal vascular resistance, which suggested severe renal vasoconstriction. Three days later, the EV had apparently increased and the RI normalized in accordance with i mprovement of renal function. The ultrasound Doppler technique is usef ul for the detection of a decrease in arterial blood flow on real time and for the diagnosis of EIARF.