An angiogram is a diagnostic and therapeutic vascular imaging test that helps identify blockages in the arterial system. During the procedure, a catheter is inserted into the femoral artery to provide access the damaged artery. Next, a contrast agent is injected into the veins surrounding the affected artery to detect possible blockages. For patients with a pre-existing vascular condition, this procedure may be performed to open arterial blockages. Patients are usually sedated throughout the procedure, which typically lasts 15-20 minutes to several hours, depending on the level of treatment required. Patients with a history of serious cardiovascular health problems, as well as current venous or vascular diseases, may need to undergo an angiogram to determine appropriate treatment options.