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Does off-pump bilateral internal thoracic artery grafting increase operative risk in dialysis patients?
Takeshi Kinoshita1, Tohru Asai, Soh Hosoba
1Department of Cardiovascular Surgery, Shiga University of Medical Science, Setatsukinowa, Ohtsu, Shiga, Japan. kinotake@belle.shiga-med.ac.jp
Insights
Bilateral internal thoracic artery (BITA) grafting is safe for dialysis patients with multivessel disease. This surgical technique showed comparable short-term outcomes to single internal thoracic artery (SITA) grafting, including mortality and wound healing.
Area of Science:
- Cardiovascular Surgery
- Thoracic Surgery
- Vascular Surgery
Background:
- Patients on chronic dialysis often have multivessel coronary artery disease.
- Internal thoracic artery grafting is a preferred method for coronary artery bypass grafting.
- Comparing bilateral (BITA) versus single (SITA) internal thoracic artery grafting in dialysis patients is crucial for optimizing outcomes.
Purpose of the Study:
- To compare short-term outcomes of bilateral internal thoracic artery (BITA) grafting versus single internal thoracic artery (SITA) grafting in patients on chronic dialysis undergoing coronary artery bypass grafting.
- To evaluate the safety and feasibility of BITA grafting in this high-risk population.
Main Methods:
- Retrospective comparison of 56 dialysis patients with multivessel disease undergoing isolated coronary artery bypass grafting (99.1% off-pump) between 2002 and 2008.
- Patients were divided into BITA (n=32) and SITA (n=23) grafting groups.
- Propensity score analysis using 13 preoperative factors was employed to minimize selection bias.
Main Results:
- No significant differences in baseline characteristics (age, LVEF, diabetes, logistic euroSCORE) between BITA and SITA groups.
- All patients underwent off-pump coronary artery bypass grafting with complete revascularization using skeletonized arterial conduits.
- No significant differences were observed in mediastinitis, impaired wound healing, or stroke between the groups. 30-day mortality was 6.3% for BITA vs. 13.0% for SITA (P=.64).
- Adjusted propensity score analysis showed BITA grafting was not associated with impaired wound healing (OR 0.63) or increased 30-day mortality (OR 0.60).
Conclusions:
- In situ skeletonized bilateral internal thoracic artery grafting is a safe and feasible surgical option for dialysis patients with multivessel coronary artery disease.
- BITA grafting demonstrates comparable short-term outcomes to SITA grafting in this patient population, including wound healing and mortality.
- The findings support the use of BITA grafting in selected dialysis patients to potentially improve long-term outcomes.
Background:
We compared short-term outcomes of patients with chronic dialysis receiving bilateral internal thoracic artery (BITA) grafting with single internal thoracic artery (SITA) grafting using propensity score analysis.
Methods:
Between 2002 and 2008, 656 consecutive patients underwent isolated coronary artery bypass grafting (99.1% off-pump). Of these, 56 patients with chronic dialysis and multivessel disease were retrospectively compared according to surgical technique, BITA (n = 32) or SITA (n = 23) grafting. In an attempt to minimize the selection bias, propensity scores were created based on 13 preoperative factors (C statistics, 0.914).
Results:
There was no significant difference in age, left ventricular ejection fraction, prevalence of diabetes mellitus, and logistic euroSCORE between the 2 groups. All patients underwent revascularization using the off-pump technique without conversion to cardiopulmonary bypass. All arterial conduits were harvested using skeletonization technique. Except for 1 patient, all ITAs were used as in situ graft. Complete revascularization was achieved in all patients. There was no significant difference in occurrence of mediastinitis, impaired wound healing, and stroke between the 2 groups. The 30-day mortality was 6.3% in the BITA group and 13.0% in the SITA group (P = .64). After adjusting for propensity score, BITA grafting was not associated with impaired wound healing (odds ratio, 0.63; 95% confidence interval, 0.04 to 8.79; P = .73) and 30-day mortality (odds ratio, 0.60; 95% confidence interval, 0.05 to 6.82; P = .68).
Conclusion:
In situ skeletonized BITA grafting is safe and feasible in dialysis patients with multivessel disease.
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