The origin of the<unk>  <unk>  is from the left sinus valsalva (LSV). Prior to entry into the coronary sulcus, it travels between the left auricle and the<unk>  pulmonary artery (PA). The left circumflex (LCX) and left anterior descending (LAD) arteries arise from the bifurcation of the<unk> , which does not have any significant branches. It is 1 to 25 mm long, and is normally 3 to 5 mm wide.  Severe narrowing of the<unk>  can result in death due to coronary ischemia, and is an indication for coronary artery bypass grafting or coronary stenting.
Left main coronary artery
Right coronary artery
Left coronary artery
Left anterior descending artery
Left circumflex artery
Right marginal branch of right coronary artery
Atrioventricular nodal branch
Pericardiacophrenic artery