Does off-pump coronary artery bypass confer any advantage in patients with end-stage renal failure? A systematic...

Area of Science:

• Cardiovascular Surgery
• Nephrology
• Clinical Outcomes Research

Background:

• Patients with end-stage renal disease (ESRD) are often excluded from clinical trials comparing coronary artery bypass grafting (CABG) techniques.
• Limited data exists on the comparative safety and efficacy of off-pump CABG (OPCABG) versus on-pump CABG (ONCABG) in ESRD patients.

Purpose of the Study:

• To compare adverse clinical events and outcomes between OPCABG and ONCABG in dialysis-dependent patients with ESRD.
• To synthesize existing evidence from retrospective studies to inform surgical decision-making for this vulnerable population.

Main Methods:

• A systematic literature search of PubMed, Scopus, and Web of Science was conducted from inception to June 2013.
• A random-effects inverse variance weighted meta-analysis was performed on data from ten retrospective studies.
• Results were reported as risk ratios (RR) with 95% confidence intervals, with statistical significance set at p<0.05.

Main Results:

• Early mortality was comparable between OPCABG (8.4%) and ONCABG (10.4%) [RR 0.80(0.51-1.17); p=0.35].
• Rates of re-exploration for bleeding and blood transfusion were similar for both surgical approaches.
• While off-pump surgery led to earlier extubation, other post-operative events like stroke and atrial fibrillation, as well as mid-term survival, were comparable.

Conclusions:

• Coronary artery bypass grafting in ESRD patients yields comparable results regardless of whether the procedure is performed off-pump or on-pump.
• Despite the limitations of available retrospective data, this meta-analysis did not identify a significant benefit of OPCABG over ONCABG in this patient cohort.