Acute Renal Failure in Open Heart Surgery
1997
A case–control study was performed to establish possible risk factors for acute renal failure (ARF) and mortality in patients undergoing cardiac surgery. A consecutive series of 704 patients were included in the study. A randomized sample of 255 patients was taken to analyze risk factors for ARF and mortality. Incidence of acute renal failure was 3.8% (27/704). Low cardiac output (LCO) was observed in all patients who developed ARF and in 72/255 without ARF (p < 0.0005). When LCO was isolated, no difference was found between groups. Association to prolonged perfusion time and sepsis increased the probability of developing ARF: 5/27 versus 0/255, p < 0.001; and 9/27 versus 0/255, p < 0.001, respectively. Overall mortality was 7.2% (51/704). Significant difference was found between ARF (55.6%, 15/27) and non-ARF patients (5.4%, 36/704), p < 0.005. Neither age nor sex was associated to outcome. Nonsurvivor patients were more oliguric (11/15 vs. 0/12, p < 0.005), required dialysis more frequently (7/15 vs. 0/...
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