Related Experiment Videos
[Patency of left border artery bypass after 1 year; comparison of three techniques]
E Bezon1, J A Barra, A Karaterki
1Service de chirurgie cardiovasculaire et thoracique, hôpital Augustin-Morvan, Brest.
Insights
Internal mammary artery bypass grafting for the left anterior descending artery shows superior one-year patency compared to venous grafts. This finding supports its use in coronary artery bypass surgery.
Area of Science:
- Cardiovascular Surgery
- Vascular Grafting
- Cardiac Surgery Outcomes
Background:
- Coronary artery disease often necessitates bypass grafting to restore blood flow.
- The left anterior descending artery is a critical target for myocardial revascularization.
- Graft choice significantly impacts long-term bypass patency and patient outcomes.
Purpose of the Study:
- To compare the one-year efficacy of three bypass grafting techniques for the left anterior descending artery.
- To evaluate the patency rates of internal mammary artery (IMA) grafts versus venous grafts.
- To assess operative mortality, morbidity, and functional results across different grafting strategies.
Main Methods:
- Retrospective analysis of 120 patients undergoing left anterior descending bypass grafting.
- Group I: Venous graft.
- Group II: In situ left internal mammary artery (LIMA) graft.
- Group III: Y-constructed LIMA graft using the right internal mammary artery (RIMA).
Main Results:
- Angiographic success rates at one year: 65.7% (venous), 89.5% (in situ LIMA), 87.8% (Y-constructed LIMA).
- Internal mammary artery grafts demonstrated significantly higher one-year patency than venous grafts (p < 0.05).
- Operative mortality, morbidity, and functional outcomes were comparable across all three groups.
Conclusions:
- Internal mammary artery grafting, both in situ and Y-constructed, offers superior one-year patency for left anterior descending artery bypass compared to venous grafts.
- IMA grafting is a reliable and effective strategy for myocardial revascularization.
- The choice of graft material significantly influences long-term bypass patency.
Abstract:
The one year results of three techniques of bypass grafting of the artery of the left border of the heart were compared in a retrospective study in 120 patients all undergoing left anterior descending bypass grafting with an internal mammary artery. Group I comprised 38 consecutive patients: the left border artery was bypassed with a venous graft. Group II comprised 49 consecutive patients who had the left border artery bypassed by an internal mammary artery in situ. Group III comprised 33 consecutive patients who had the left border artery bypassed by an internal mammary graft issuing from a Y-shaped construction (right internal mammary artery as a free graft reimplanted into the left internal mammary artery). The operative mortality, morbidity and functional results were comparable in the three groups. The rate of angiographic success of the left border artery graft at one year was: 65.7% in group I, 89.5% in group II and 87.8% in group III. The one year patency of internal mammary artery grafting of the artery of the left border was higher than that of venous grafts (p < 0.05).