You Are Examining a 63-Year-Old Woman Who Has Come to You

You are examining a 63-year-old woman who has come to you complaining of headache, lightheadedness, and facial swelling. Upon physical examination of the patient you suspect she may have restricted blood flow in a major artery or vein so you order a routine angiography. The results of the angiography indicate a reduction in blood flow entering the right side of the heart. Where is the most likely location of the restriction to blood flow?

A) common iliac artery
B) external carotid artery
C) pulmonary artery
D) superior vena cava
E) thoracic aorta