Posterior interventricular artery

Posterior interventricular artery

Base and diaphragmatic surface of heart. (Posterior descending artery not visible, but it runs near the middle cardiac vein, which is labeled at the bottom.)

Details
Source right coronary artery
Vein middle cardiac vein, posterior interventricular vein[1]
Supplies ventricles
interventricular septum
Identifiers
Latin ramus interventricularis posterior arteriae coronariae dextrae
Dorlands
/Elsevier		 a_62/12157870
TA A12.2.03.108
FMA 3840

Anatomical terminology

In the coronary circulation, the posterior interventricular artery (PIV) or posterior descending artery (PDA) is an artery running in the posterior interventricular sulcus to the apex of the heart where it meets with the anterior interventricular artery. It supplies the posterior 1/3rd of the interventricular septum. The remaining anterior 2/3rds is supplied by the anterior interventricular artery which is a septal branch of the left anterior descending artery, which is a branch of left coronary artery.

It is typically a branch of the right coronary artery (70%, known as right dominance). Alternately, the PIV can be a branch of the circumflex coronary artery (10%, known as left dominance) which itself is a branch of the left coronary artery. It can also be supplied by an anastomosis of the left and right coronary artery (20%, known as co-dominance).[2]

Variants have been reported.[3]

The anatomical position of the artery is not really posterior, but inferior. The terminology posterior is based on viewing the heart from the "Valentine" position, not by the heart's actual position in the body. [4]

Additional images

Coronary arteries (labeled in red text) and other major landmarks (in blue text). Posterior descending artery is labeled at left.

References

  1. ↑ Nerantzis CE, Lefkidis CA, Smirnoff TB, Agapitos EB, Davaris PS (November 1998). "Variations in the origin and course of the posterior interventricular artery in relation to the crux cordis and the posterior interventricular vein: an anatomical study". Anat. Rec. 252 (3): 413–7. doi:10.1002/(SICI)1097-0185(199811)252:3<413::AID-AR9>3.0.CO;2-9. PMID 9811219.
  2. ↑ Fuster, V; Alexander RW; O'Rourke RA (2001). Hurst's The Heart (10th ed.). McGraw-Hill. p. 53. ISBN 0-07-135694-0.
  3. ↑ Topaz O, Holdaway B, Bailey NT, Vetrovec GW (1997). "Anatomic variant of the posterior interventricular coronary artery: implications for coronary angioplasty in acute myocardial infarction". Clin Anat 10 (5): 303–6. doi:10.1002/(SICI)1098-2353(1997)10:5<303::AID-CA2>3.0.CO;2-R. PMID 9283726.
  4. ↑ http://onlinelibrary.wiley.com/doi/10.1111/j.0021-8782.2004.00330.x/full

External links


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