graft patency
Pronunciation: graft PAY-ten-see
The state of a bypass graft remaining open and functional, allowing adequate blood flow to the target coronary territory.
Full Definition
Graft patency refers to the state of a coronary artery bypass graft remaining open, unobstructed, and functionally capable of delivering adequate blood flow to the target myocardial territory. This critical outcome measure is assessed through various methods including angiography, computed tomography, or functional stress testing at different time intervals post-surgery. Factors affecting patency include graft type (arterial versus venous), target vessel characteristics, surgical technique, and patient factors such as smoking, diabetes, and lipid levels. Arterial grafts, particularly the left internal mammary artery, demonstrate superior long-term patency compared to saphenous vein grafts. Medical editors should note that patency can be described as early (within 30 days), intermediate (1-5 years), or late (beyond 5 years), with different implications for patient management and outcomes.
Usage
Usage note: Specify time frame when relevant (early, late patency); distinguish from flow measurements or functional assessments.
In Context
- "One-year angiographic follow-up demonstrated excellent graft patency in all three bypass conduits." — follow-up report
- "The study compared 10-year graft patency rates between radial artery and saphenous vein grafts." — research publication