Why is LIMA-to-LAD patency particularly significant for long-term CABG outcomes?

• A. It demonstrates arterial graft durability and is strongly associated with improved long-term survival and reduced angina.
• B. It has little impact on long-term outcomes.
• C. LIMA-to-LAD patency is rarely achieved.
• D. LIMA-to-LAD patency only affects early recovery.

Answer: (A)

Durable perfusion of a large heart region drives long-term success after CABG. The LAD supplies a major portion of the left ventricle, so keeping a graft open to this artery provides continuous, reliable blood flow to the most critical myocardial territory. Arterial grafts, particularly the LIMA, have superior long-term patency due to their favorable biology and flow properties, which translates into fewer episodes of angina and less risk of recurrent ischemia. In many patients, the LIMA-to-LAD graft remains patent for many years (often cited as roughly a high percentage at 10 years), and this durability is a central reason why long-term survival improves when the LIMA-to-LAD connection stays open. In short, maintaining patency in this graft means sustained perfusion to a key area of the heart, leading to better survival and fewer angina-related events over time.