Third Obtuse Marginal Branch Artery

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** The third artery arising from the left circumflex artery that supplies the lateral wall, when counted from proximal to distal.

**Synonyms:** - 3RD OM - THIRD OBTUSE MARGINAL BRANCH ARTERY - THIRD OBTUSE MARGINAL BRANCH ARTERY SEGMENT - Third Left Marginal Artery