All of the following are true about coronary aery, EXCEPT?
Only one obtuse marginal aery(OM1) arise from circumflex branch of left coronary aery. This obtuse marginal branch serve as a boundary between the proximal and distal poion of left circumflex aery(LCx). Poion of left circumflex aery proximal to obtuse marginal aery is called proximal LCx, whereas the segment below OM1 is the distal LCx.
Right coronary aery lies in right anterior coronary sulcus
Left anterior descending aery is a branch of left coronary aery
Usually 3 obtuse marginal aeries arise from left coronary aery
In 85% cases posterior descending interventricular aery arises from right coronary aery