Cardiac catheterisation. View of surgeons performing a cardiac catheterisation procedure. This is done to obtain images of the blood flow in the arteries around the heart. The patient, under a local anaesthetic, has a fine tube (catheter) inserted into an artery in the groin or thigh. The catheter is manoeuvred along blood vessels to the heart. Once the catheter is in place, a dye which is opaque to X-rays is injected to outline the blood flow in the arteries on X-ray film. The results of this procedure are being viewed on the monitor at upper right.
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