Left lateral view. Pulmonary artery (PA) arising from the right ventricle, which is separated from the left ventricle (LV) by the anterior descending artery (1). The Left atrium with it appendage (LAA) separated from the left ventricle by the left circumflex artery (2), and the left marginal artery (3), arising from this last one. Observe a small intermediate artery. In this case the left atrial appendage si relatively small and all the vessels can be easily seen.