Third Posterolateral Descending Artery

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

**Definition:** In an individual with a left-dominant heart, this is the third branch that arises from the circumflex artery atrioventricular groove continuation when counted from proximal to distal. It supplies the posterolateral wall.

**Synonyms:** - 3RD LPL - THIRD POSTEROLATERAL DESCENDING ARTERY - THIRD POSTEROLATERAL DESCENDING ARTERY SEGMENT