[Coronary artery bypass grafting in the patients with renal dysfunction]

Area of Science:

• Cardiovascular Surgery
• Nephrology
• Renal Dysfunction Management

Context:

• Coronary artery bypass grafting (CABG) is a critical intervention for patients with coronary artery disease.
• Renal dysfunction presents significant challenges and risks in patients undergoing major cardiac surgery.
• Limited data exists on the comparative outcomes of CABG in patients with varying degrees of renal impairment.

Purpose:

• To evaluate and compare the perioperative and long-term outcomes of CABG in patients with end-stage renal disease on hemodialysis versus those with significant renal dysfunction not requiring dialysis.
• To assess the impact of CABG on graft patency, hospital mortality, and survival rates in these patient cohorts.
• To explore the potential benefits of off-pump versus on-pump CABG in preserving renal function.

Summary:

• A study of 59 patients with renal dysfunction undergoing CABG revealed comparable preoperative and perioperative factors between end-stage renal disease (ESRD) patients on hemodialysis (Group A) and those with creatinine >1.5 mg/dl not on dialysis (Group B).
• Both groups demonstrated low hospital mortality rates, with Group B showing slightly higher graft patency (99% vs. 95%) and longer in-hospital days (30.1 vs. 24.8).
• Four-year survival rates were 75.3% for Group A and 84.3% for Group B, with cardiac event-free rates of 93.3% and 97.5%, respectively. Off-pump CABG was suggested for better renal function preservation.

Impact:

• Coronary artery bypass grafting can be safely performed in patients with renal dysfunction, offering improved outcomes.
• The findings suggest that CABG may enhance the post-operative condition of patients with renal impairment.
• Off-pump CABG emerges as a potentially superior technique for maintaining renal function post-surgery in this vulnerable population.