Have a single coronary artery (right) the LAD and LCX both arise out of the right coronary artery....The LAD does return to the left going between the aorta and the pulmonary arteries....Lucky for me the LAD is deformed and not even close to being the size it should be so it is not being squashed ..... I have only been able to find one other person that has this exact variation as me ....I would like to know if any of the doctors know the rarity of this.....I am doing very well on medication so I have no complaints...Just wondering