Anomalous origin of the left main coronary artery from the pulmonary artery, also known as Bland-White-Garland syndrome, is a rare malformation. Few patients survive past childhood without surgical repair, and up to 90% die suddenly at a mean age of 35 years. We describe a case of a 60-year-old patient with anomalous origin of the left main coronary artery from the pulmonary artery in which 2-dimensional and color flow Doppler visualization of the intercoronary (so-called "steal") collaterals was the first marker that alerted the examiner to the possibility of this diagnosis, subsequently guided step-by-step the echocardiographic approach.