If circumflex aery gives the posterior interventricular branch, this circulation is described as

In about 10% of heas,the right coronary is rather small and is not able to give the posterior interventricular branch. In these cases the circumflex aery,the continuation of left provides the posterior interventricular branch and called left dominant. <img src=" /> B D CHAURASIA'S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME1 SIXTH EDITION Page no:265