ZEPHYR / SCIENCE PHOTO LIBRARY ZEPHYR / SCIENCE PHOTO LIBRARY
Angiography video of the lower limbs of a 57-year-old patient, showing a blockage (thrombosis) of the femoral artery (upper right). The blood flow resumes below the blockage due to the flow of blood through the supporting arterial network. Angiography is an imaging technique in which a radio-opaque contrast medium is injected into blood vessels to allow them to be seen on an X-ray.
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