Early and long-term results of bilateral internal thoracic artery
grafting in dialysis patients
Abstract
Background: The benefits of bilateral internal thoracic artery (BITA)
grafting during coronary artery bypass grafting in dialysis-dependent
end-stage renal disease patients remain unclear. We compared the early
and long-term effectiveness of coronary artery bypass using BITA versus
single internal thoracic artery (SITA) grafting in this population.
Methods: Eighty-nine consecutive patients with dialysis-dependent
end-stage renal disease who underwent isolated coronary artery bypass
grafting were retrospectively analyzed. Early and long-term results were
reviewed, and univariate and multivariate analyses of risk factors for
late death and major adverse cardiac events (MACE) was performed.
Results: There was no significant difference between the BITA (n = 65)
and SITA (n = 24) groups in in-hospital mortality (0% vs. 4.2%, p =
0.27) and the incidence of deep surgical wound infection (4.6% vs.
4.2%, p = 1.00). The overall survival rate in the BITA and SITA groups
were 90.2% vs. 82.3%, 64.6% vs. 57.6%, and 51.8% vs. 20.6% at 1,
3, and 5 years, respectively. Overall survival was comparable but was
more favorable in the BITA group (p = 0.08). MACE-free rate in the BITA
and SITA groups were 96.6% vs. 90.2%, 87.4% vs. 60.6%, and 70.1%
vs. 51.8% at 1, 3, and 5 years, respectively. The MACE-free rate was
significantly higher in the BITA group (p = 0.04). Conclusions: While
BITA grafting did not show a significant survival benefit over SITA
grafting, it did not increase surgical complications and improve the
MACE-free rate. BITA grafting may be a reasonable surgical strategy in
dialysis-dependent patients.