LIMA graft
Pronunciation: LIE-mah
Also written as: LIMA — Left Internal Mammary Artery graft
A bypass conduit using the left internal mammary artery, typically anastomosed to the left anterior descending coronary artery.
Full Definition
A LIMA graft refers to the use of the left internal mammary artery as a bypass conduit in coronary artery bypass surgery. The LIMA is considered the gold standard conduit for revascularizing the left anterior descending artery due to its excellent long-term patency rates and resistance to atherosclerosis. The artery is typically left attached to its origin from the left subclavian artery and anastomosed distally to the target coronary vessel. LIMA grafts demonstrate superior longevity compared to saphenous vein grafts, with 10-year patency rates exceeding 95%. In imaging studies, LIMA grafts can be evaluated using CT angiography, invasive angiography, or specialized MRI techniques.
Usage
Usage note: Also abbreviated as LITA (left internal thoracic artery); both terms are acceptable.
In Context
- "The LIMA graft to the LAD demonstrates excellent flow without evidence of stenosis." — Post-operative angiogram report
- "CT angiography confirmed patency of the LIMA graft with no significant narrowing." — Follow-up imaging report