Mild renal dysfunction predicts in-hospital mortality and post-discharge survival following cardiac surgery☆☆☆ (original) (raw)
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Does the Stage of Chronic Kidney Failure Influence the Outcome in Cardiac Surgery?
Advances in Clinical and Experimental Medicine, 2015
Background. The number of patients with chronic kidney failure requiring cardiac surgery is continuously increasing. Additionally, significant worsening in the overall risk profile of this group of patients is noted. Objectives. To investigate the effect of chronic renal dysfunction both in non-dialysis-dependent renal failure and end-stage renal failure patients, on early mortality-morbidity and late survival in a series of cardiac surgery patients at our institution. Material and Methods. 1344 patients who had open heart surgery at our university hospital between 2010 and 2013 were retrospectively reviewed. Chronic renal dysfunction was defined according to preoperative glomerular filtration rate. Patients selection (n = 80). Group 1 mild-(GRF 59-30 mL/min), Group 2 moderate-(GFR 29-15 mL/min), Group 3 end stage-(GFR < 15 mL/min) renal failure. Results. Chronic renal dysfunction was present in 5.95 % of all patients studied. Group 1-55 (68.75%), Group 2-16 (20%), Group 3-9 (11.25%). No difference between the groups in the need for heart inotropic support was noted; however the use of these medications was necessary in 60.6% of all studied patients. Forty nine percent in Group 1, 87.5% in Group 2 and 77% in Group 3, respectively. Renal replacement therapy in the early postoperative period was needed in 12 patients, with significance between the groups (p = 0.001). The overall hospital mortality was 2.5%. Follow-up was completed with a mean of 1.4 years (range 2 months to 4 years). There were 6 (7.5%) late deaths. Conclusions. Our observations do not exhibit large variations in postoperative complications and deaths in patients with chronic renal failure, depending on the degree of preoperative renal function impairment. It seems that renal failure regardless of the degree of impairment is a factor aggravating the intra and post-operative course in cardiac surgery patients (Adv Clin Exp Med 2015, 24, 5, 845-850).
Renal Failure, 2008
Acute kidney injury (AKI) occurs frequently after cardiac surgery. Although numerous variables were identified as predictors for AKI, there is a lack of information about possible differences in risk factors according to the level of preoperative renal function. Preoperative, intraoperative, and postoperative data from 4118 adult patients submitted to cardiac surgery from January 1, 2000, to December 31, 2005, were included in the study. AKI was defined by an increase in serum creatinine (S Cr) ≥ 0.3 mg/dL after surgery. Patients were stratified into two groups: group 1, C Cr ≥ 60 mL/min/1.73 m 2 BSA; group 2, C Cr < 60 mL/min/1.73 m 2 BSA. Risk factors were assessed using a multiple logistic regression model. In all, 749 patients (42.5%) developed AKI. The mortality rate of the entire population was a 5.2%. In patients of group 1 (n = 2678), the variables independently associated with the onset of AKI were age, diabetes, preoperative use of diuretics, non-scheduled surgery, cardiopulmonary bypass (CPB) time, CPB mean arterial pressure, hemodilution, and postoperative use of norepinephrine. Baseline S Cr was associated with AKI only in patients of group 2 (n = 1440). Age, EuroSCORE, non-coronary surgery, hemodilution, and postoperative use of vasoactive drugs were also predictors of AKI in this group of patients. The mortality rate was significantly higher in group 2 than group 1 (8.5% vs. 3.6%, p = 0.000). In conclusion, the present study demonstrated a difference in variables associated with postoperative AKI, according to baseline renal function. The degree of preoperative renal function was a predictor of AKI only in patients with CKD stages 3-4, as well as other risk factors. In addition to other well known risk factors for AKI in this setting, the use of diuretics in patients of group 1 and the level of hemodilution during CPB in both groups should be emphasized, as they are potentially modifiable.
Interactive cardiovascular and thoracic surgery, 2007
Acute renal failure requiring continuous renal replacement therapy post cardiac surgery carries a high mortality. Most studies have focused on patients with impaired renal function preoperatively but little is known about predictors of such a complication in patients with preoperatively normal renal function. This is a retrospective review of a prospective collected database. A total of 1609 patients underwent cardiac surgery over a 4-year period. Dialysis was required in 47 patients (2.9%). Univariate analysis identified the following as significant risk factors: age, female gender, chronic obstructive pulmonary disease, congestive cardiac failure, creatinine clearance, Euro, Parsonnet and Cleveland clinic scores, body mass index, non-isolated CABG, cardiopulmonary bypass time, extubation time and pulmonary complications (P<0.05). Multivariate analysis identified EuroSCORE, congestive cardiac failure, insulin-dependent diabetes, emergency surgery, postoperative extubation time a...
Interactive cardiovascular and thoracic surgery, 2008
It is well known that end-stage renal failure requiring dialysis negatively impacts early and late outcome of cardiac surgery. However, data with respect to non-dialysis-dependent renal failure patients (NDRF) are limited. We retrospectively analyzed 6940 consecutive patients undergoing cardiac surgery from January 1998 to September 2006. Patients undergoing cardiac transplantation and ventricular assist device implantation (n=246) and dialysis dependent patients (n=245) were excluded. NDRF was present in 135 (2.1%) patients (mean age 64+/-14, 38% female). NRDF patients were more likely to present with cardiac related risk factors including ejection fraction <30% (P<0.001), prior myocardial infarction (P<0.001), congestive heart failure…
Outcomes of cardiac surgery in chronic kidney disease
The Journal of Thoracic and Cardiovascular Surgery, 2014
Objective: To identify predictors of early and late outcomes of cardiac surgery in patients with chronic kidney disease. Methods: Patients (n ¼ 545) with serum creatinine !200 mmol/L or renal dialysis were identified from databases maintained by the largest Sydney cardiothoracic surgical units with data consistent with the Australian and New Zealand Society of Cardiothoracic Surgeons data definitions. The patient data were matched against the National Dialysis Database and the New South Wales Register of Births, Deaths, and Marriages. Statistical analysis was used to identify predictors of early and late outcomes. Results: The Kaplan-Meier estimate of 1-, 5-, and 10-year survival for all patients was 78%, 56%, and 36%, respectively. The outcomes were similar after coronary bypass surgery and valve replacement and were also similar for dialysis and nondialysis patients. The odds ratios for the significant independent predictors of outcomes were, for perioperative death, age (1.4 per decade), emergency surgery (7.0), redo surgery (3.8), left ventricular impairment (moderate, 2.7; severe, 4.4); for new early postoperative dialysis, estimated glomerular filtration rate<20 mL/min (3.8), emergency surgery (2.7), tricuspid valve surgery (4.4); for new permanent dialysis within 6 months of surgery, serum estimated glomerular filtration rate<20 mL/min (odds ratio, 4.6). The hazard ratio for the independent predictors of late death in those alive 6 months after surgery was 1.4 per decade for age and 1.4 for moderate or severe left ventricular impairment. Conclusions: Left ventricular impairment is a risk factor for perioperative and late death in patients with kidney disease. After cardiac surgery, preoperative dialysis-dependent and dialysis-free patients had similar long-term outcomes.
International Journal of Surgery, 2011
Objectives: Although previous studies have shown increased mortality in renal dysfunction patients undergoing cardiac surgery, there is lack of data on the pattern of postoperative complications that occur in such patients and their distribution among dialysis and non-dialysis dependent renal dysfunction. Methods: This is a retrospective review of prospectively collected data over 8 year period of cardiac surgery patients. Our cohort consisted of 3598 consecutive patients divided into: normal kidneys (n ¼ 3276, 91%), renal dysfunction (n ¼ 277, 8%) and dialysis (n ¼ 45, 1%). Postoperative complications and mortality were analysed. Multivariate analysis was conducted to adjust for the potential confounders in the association between renal dysfunction and postoperative complications. Results: Univariate analysis showed increased risk of the following complications among renal dysfunction and dialysis patients: low cardiac output, arrhythmias, reoperation, prolonged ventilation, readmission to intensive care, blood transfusion and prolonged hospital stay. Mortality rate was highest in dialysis patients compared to renal dysfunction and normal kidney patients (11% vs. 7% vs. 3%, respectively p-value <0.001). Multivariate analysis showed that renal dysfunction with or without dialysis is an independent predictor of postoperative low cardiac output, blood transfusion, prolonged ventilation, and mortality. The odd ratios were higher for dialysis than non-dialysis dependent patients. This effect persisted after adjusting for potential confounders such as age and gender. Conclusion: The presence of renal dysfunction preoperatively increases the rate of postoperative complications and mortality following cardiac surgery. Prior knowledge of these complications can help in developing preventative strategies to reduce the associated risk.