LIMA
Pronunciation: LY-mah
Also written as: LIMA — Left Internal Mammary Artery
Left internal mammary artery, a preferred arterial conduit for coronary artery bypass grafting, particularly to the left anterior descending artery.
Full Definition
LIMA (Left Internal Mammary Artery), also known as the left internal thoracic artery, is the gold standard arterial conduit for coronary artery bypass grafting, particularly for revascularization of the left anterior descending coronary artery. This vessel originates from the left subclavian artery and runs along the internal chest wall, making it easily accessible during cardiac surgery. The LIMA demonstrates superior long-term patency rates compared to saphenous vein grafts, with 10-year patency rates exceeding 90%. Harvesting techniques include pedicled grafts (with surrounding tissue) or skeletonized grafts (vessel only). Medical editors should note that LIMA grafting to the LAD is considered the standard of care in coronary bypass surgery and significantly improves long-term survival.
Usage
Usage note: May be written as LIMA or spelled out; LITA is acceptable alternative abbreviation for left internal thoracic artery.
In Context
- "The LIMA was harvested as a pedicled graft and anastomosed to the mid-LAD with excellent flow." — operative report
- "Long-term studies consistently demonstrate superior patency of LIMA grafts compared to venous conduits." — literature review