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[The specific features of renal dysfunction in cardiosurgical patients].

Subclinically insignificant glomerular filtration disturbances were found during operations under extracorporeal circulation. After termination of perfusion, dysfunction of the proximal portion of renal tubules was recorded in all patients. This may be associated with that the proximal tubules were more susceptible to ischemia. Further impairments of the distal portions of renal tubules suggest the persistence of ischemic lesions of the tubular apparatus.