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Intraoperative coronary graft flow determination--does it have a prognostic value for midterm graft patency?
S M Cetin1, P Massoudy, M Thielmann
1Department of Thoracic and Cardiovascular Surgery, University Hospital, Hufelandstr. 55, D-45147 Essen, Germany.
Insights
Intraoperative ultrasonic graft flow measurement predicts mid-term patency in coronary artery bypass grafting (CABG) vein grafts. Higher graft flow indicates better graft survival, offering a valuable prognostic tool.
Area of Science:
- Cardiovascular Surgery
- Vascular Surgery
- Medical Imaging
Background:
- Coronary artery bypass grafting (CABG) is a common procedure for treating coronary artery disease.
- Graft patency is crucial for long-term success after CABG.
- Assessing graft function during surgery can potentially improve patient outcomes.
Purpose of the Study:
- To evaluate the prognostic significance of intraoperative ultrasonic graft flow measurement.
- To determine the relationship between intraoperative graft flow and mid-term graft patency in CABG patients.
Main Methods:
- A retrospective analysis of 3146 CABG procedures performed between 2000 and 2003.
- Intraoperative ultrasonic graft flow was measured in all patients.
- Postoperative coronary angiography was performed on 100 patients at a mean of 8 months.
Main Results:
- Mid-term patency rates were 98% for internal thoracic artery (LITA) grafts and 85% for venous grafts.
- Mean graft flow was significantly higher in patent venous grafts (48 ml/min) compared to occluded grafts (32 ml/min).
- Intraoperative vein graft flow was a significant predictor of mid-term patency (p=0.005).
Conclusions:
- Intraoperative ultrasonic graft flow measurement is a valuable predictor of mid-term graft patency in CABG.
- Higher intraoperative flow in venous grafts is associated with better long-term patency.
- This technique can aid in assessing graft quality and predicting outcomes.
Objective:
To characterise the prognostic value of intraoperative ultrasonic graft flow determination during CABG for mid-term patency.
Methods:
From 01/2000 to 08/2003 3146 CABG procedures were performed at our institution. Graft flow was determined in all patients. Lumen diameter was given in mm and a sclerosis score was applied for the target vessel. 100 of these patients (3.2%) underwent postoperative coronary angiography at a mean time interval of 8.0 +/- 0.5 months.
Results:
In 100 patients, 114 LITA and 204 venous anastomoses were performed. At re-angiography 112 LITA (98%) and 174 venous (85%) anastomoses were patent. The amount of occluded LITA grafts was to low to perform statistical analyses. Mean graft flow of patent vein grafts was 48 +/- 2 ml/min vs. 32 +/- 4 ml/min in occluded vein grafts (p = 0.001). After multiple logistic regression analysis, only intraoperative vein graft flow was found to be a predictor for patency at mid-term (p = 0.005, odds ratio 0.97, 95% confidence interval (CI) from 0.95-0.99). No differences were found concerning sclerosis scores or vessel lumen between patent and occluded grafts.
Conclusions:
Significant differences concerning intraoperative graft flow were found between vein grafts patent or occluded at re-angiography. The predictive power of intraoperative vein graft flow for mid-term patency was confirmed by multiple logistic regression analysis.
