Final answer:
The median cubital vein is commonly used for angiographic catheter insertion due to its superficial location in the antecubital region, which allows easier access for the procedure.
Step-by-step explanation:
The vein frequently used for insertion of an angiographic catheter is the median cubital vein. This vein is a superficial vessel located in the antecubital region that connects the cephalic vein to the basilic vein, forming a V-shape. Its accessibility makes it a common site for venous blood draws in humans. Other veins such as the cephalic, basilic, and brachial veins may also be utilized for catheter insertion depending on various factors like patient's anatomy and the specific procedure.