A middle age man with known atherosclerotic disease presents with left arm claudication, fatigue, coolness, and tingling. He gets dizzy when he exercises the arm. On examination, you note the left arm has a 15mmHg lower systolic pressure than the right arm. Palpation of both radial pulses shows a decreased amplitude and delayed arrival on the left side.
Challenge: If blood is flowing in the wrong direction, what syndrome is this?