Key result
Arterial T-grafts show ~40% larger proximal LIMA diameters vs single LIMA 12 years post-CABG.
Why the study?
Does arterial T-grafting compared to conventional single LIMA grafting alter anatomical and functional graft characteristics 12 years after CABG?
Cross-Sectional (n=34)
Does arterial T-grafting compared to conventional single LIMA grafting alter anatomical and functional graft characteristics 12 years after CABG?
Absolute Event Rate: 3.5% vs 2.5%
p-value: p=0.00007
Twelve years after CABG, proximal LIMA diameters and areas are significantly larger in T-grafts compared to single LIMA grafts, though most ultrasonographic functional variables equalize between groups.
We determined whether ultrasonographic left internal mammary artery (LIMA) findings correspond with 64 multislice computed tomography (MSCT) in patients 12 years after coronary artery bypass grafting. We included 34 patients (63.2+/-9.2 years), 16 with conventional single LIMA (group I) and 18 arterial T-grafts (group II), in a cross-sectional study. Patients underwent transthoracic proximal LIMA ultrasonography at rest and during the Azoulay maneuver, transthoracic echocardiography of the left ventricle and 64-MSCT, 11.5+/-1.4 years postoperatively. MSCT scans showed three string sign LIMA grafts (19%) in group I and three distal string sign LIMA grafts (17%) and 16 occluded T-graft anastomoses (22%) in group II. LIMA diameters and areas are significantly larger in group II in the origin, 3.5+/-0.7 vs. 2.5+/-0.5 mm, P=0.00007 and 0.09+/-0.04 vs. 0.05+/-0.02 cm(2), P=0.00019 and in the third intercostal space, 3.4+/-0.7 vs. 2.5+/-0.5 mm, P=0.00009 and 0.09+/-0.03 vs. 0.05+/-0.02 cm(2), P=0.000047. Most ultrasonographic LIMA findings do not differ between the groups. Thus, proximal LIMA diameters and areas are significantly larger in T-grafts and ultrasonographic variables equalize between the groups at rest and during the Azoulay maneuver 12 years after surgery.
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Hartman et al. (2009) conducted a cross-sectional in coronary artery bypass grafting (n=34). Arterial T-grafts vs. Conventional single LIMA was evaluated on Proximal LIMA diameter in the origin (p=0.00007). Arterial T-grafts had significantly larger proximal LIMA diameters (3.5 vs 2.5 mm, P=0.00007) and areas compared to conventional single LIMA 12 years after coronary artery bypass grafting.
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