For the femoral site, the catheter is introduced via a sheath in the femoral artery, and is advanced up the abdominal aorta, over the aortic arch, and dye is then injected into the
coronary arteries. For the radial site, the
right radial
artery is most often used. The catheter is advanced up the right radial, brachial, axillary, and subsequently the subclavian artery. The aortic arch does not nave to be navigated.