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Retrograde thoracic aortography is a safe, simple method of opacifying and recording roentgenographically the thoracic aorta and its branches for the purpose of studying diseases intrinsic to these great vessels as well as those structures adjacent to their course.
Preliminary studies include a complete blood count; urinalysis; determination of blood urea nitrogen, bleeding and clotting times, and prothrombin time; electrocardiogram; and evaluation of the peripheral pulses. After adequate premedication, percutaneous catheterization of the femoral artery is carried out with local anesthesia using the Seldinger technique.1 Under fluoroscopic control, a No. 7 or 8 Teflon catheter is advanced over a spring guide into the ascending aorta until its tip lies approximately 2 cm above the valve. The negotiation of the arch is facilitated by a gentle preformed curve in the catheter tip. Upon withdrawal of the spring guide, 10 cc of blood is forcefully aspirated to remove any clot formation
Panaro VA, Leslie EV, Bergmann KF. Retrograde Thoracic Aortography. JAMA. 1967;200(9):785–787. doi:10.1001/jama.1967.03120220087017
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