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Assessment of Vascular Function in Patients With Chronic Kidney Disease
Published on: June 16, 2014
Multiple risk assessment of cardiovascular surgery in chronic renal failure patients
Bartlomiej Witczak1, Anders Hartmann, Jan L Svennevig
1Department of Medicine, Section of Nephrology, Rikshospitalet University Hospital, University of Oslo, Oslo, Norway. bartlomiej.witczak@rikshospitalet.no
Insights
Cardiovascular surgery in patients with chronic renal failure leads to increased complications and significantly higher short-term and long-term mortality. Key risk factors include age, COPD, diabetes, and dialysis dependence.
Area of Science:
- Cardiovascular Surgery
- Nephrology
- Critical Care Medicine
Background:
- Chronic renal failure (CRF) is a significant risk factor for adverse outcomes in cardiovascular surgery.
- This study evaluates the results of cardiovascular surgery in patients with CRF compared to a matched control group.
Purpose of the Study:
- To assess the outcomes of cardiovascular surgery in patients with chronic renal failure.
- To identify preoperative risk factors associated with mortality in this patient population.
Main Methods:
- A retrospective analysis of 106 patients with CRF undergoing cardiovascular surgery between 1990 and 2000.
- Patients were matched with 106 controls based on age, sex, year of operation, type of operation, and diabetes status.
Main Results:
- CRF patients experienced longer ventilation support, ICU, and hospital stays.
- CRF patients required more blood product transfusions.
- Early mortality (16% vs 6.6%) and 5-year mortality (79% vs 39%) were substantially higher in the CRF group.
Conclusions:
- Patients with chronic renal failure undergoing cardiovascular surgery face increased postoperative complications and significantly higher mortality rates.
- Independent preoperative risk factors for mortality in CRF patients include advanced age, chronic obstructive pulmonary disease, diabetes, and dialysis dependence.
Background:
Chronic renal failure is a major risk factor in cardiovascular surgery. We evaluated results of cardiovascular surgery in chronic renal failure patients (s-creatinine > 200 micromol/L or established dialysis) at our center from 1990 to 2000.
Methods:
One hundred and six chronic renal failure patients underwent cardiovascular surgery (56 coronary artery bypass operations, 25 valve replacements with or without coronary bypass, and 25 other major cardiovascular operations [8 thoracic aorta, 10 abdominal aorta, 7 other]). Matched controls were selected (n = 106) based on age, sex, year, and type of operation and occurrence of diabetes.
Results:
There were 88 men and 18 women and mean age was 64 +/- 10 years (standard deviation). Demographics did not differ between chronic renal failure and control patients, except for hypertension (more prevalent in chronic renal failure group, p < 0.05). Intraoperative hemorrhage, perfusion and ischemia time, and reoperation did not differ between groups. Chronic renal failure patients received more transfusions of red blood cells, plasma, and platelets (p < 0.02). Ventilation support (27.6 +/- 59.3 hours), intensive care unit stay (7.7 +/- 8.3 days), and hospital stay (12.3 +/- 10.5 days) were longer (p < 0.02). Early mortality was 16% versus 6.6% (p = 0.04) and 5-year mortality was 79% versus 39% (p < 0.05) for chronic renal failure and control patients, respectively. Independent preoperative risk factors of mortality for chronic renal patients were age greater than 70 years (relative risk = 2.32, p = 0.001), chronic obstructive pulmonary disease (relative risk = 2.59, p = 0.001), diabetes (relative risk = 1.80, p = 0.037), and dialysis (relative risk = 2.03, p = 0.005).
Conclusions:
Chronic renal failure patients suffered more postoperative complications and had substantially increased short-term and long-term mortality rates. Independent preoperative mortality risk factors for chronic renal failure patients were age, chronic obstructive pulmonary disease, diabetes, and chronic dialysis.
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