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LIMA-RIMA Y (Left Internal Mammary Artery-Right Internal Mammary Artery Y) cardiac surgery is a type of coronary artery bypass grafting (CABG) that uses both the LIMA and RIMA arteries as blood vessel grafts to bypass blocked arteries in the heart, forming a Y-shaped configuration. This "total arterial revascularization" method is favored for its long-term patency rates and superior results compared to traditional vein grafts, providing a more durable blood supply to the heart.

How the LIMA-RIMA Y Graft Works

• Grafting Material : The LIMA and RIMA are arteries located in the chest wall.
• Y-Shaped Configuration: The grafts are arranged in a Y-shape, allowing the two arterial conduits to bypass multiple coronary artery blockages.
• Bypass Target: The LIMA is typically used to bypass the Left Anterior Descending (LAD) artery and its branches, while the RIMA is used to bypass other coronary arteries, such as the marginal (OM) or Posterior Descending Artery (PDA).
• Improved Blood Flow: The goal is to create a new, healthy route for blood to reach the heart muscle, restoring optimal blood flow.