Arteria lusoria is a congenital anomaly of the right subclavian artery characterized topographically as follows: the artery originates below the left subclavian artery as the fourth main branch of the aortic arch and turns to the right behind the esophagus and in front of the vertebral column. It is an anomaly having incidence of 0.4% to 2%. While crossover to an alternative arterial site is reasonable, the following protocol has worked consistently to pass through this anomaly.
It is divided into two parts:
(1) Entering the ascending aorta through arteria lusoria
(2) Cannulation of the coronary arteries