Figure 1From: Protocol for the Arterial Revascularisation Trial (ART). A randomised trial to compare survival following bilateral versus single internal mammary grafting in coronary revascularisation [ISRCTN46552265]Schematic drawing showing typical examples of: (1) Single internal mammary artery (SIMA) grafts and (2–4) Bilateral internal mammary artery (BIMA) grafts. Key: IMA = internal mammary artery; RA = radial artery; SVG = saphenous vein graft.Back to article page