GARY G. WINZELBERG, M.D.
To the editor: The article by Cebul and Ginsberg (1) describes digital subtraction intravenous angiography as a noninvasive method. Initial studies with this method used a 16 gauge catheter (2) in the antecubital vein for contrast injection. However, most investigators have found this method suboptimal and many now use a 5 or 6 French catheter placed in the superior vena cava or right atrium. This method cannot be labeled noninvasive. Although the method does not carry the risks of selective carotid angiography, it is an invasive procedure with some inherent risk from venous catheterization and contrast injection. Nevertheless, digital subtraction
GARY G. WINZELBERG. Tests for Carotid Artery Disease. Ann Intern Med. 1983;98:556. doi: 10.7326/0003-4819-98-4-556_1
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Published: Ann Intern Med. 1983;98(4):556.
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