Coronary Artery Dominance 

The artery that supplies the Posterior Descending Artery and the Posterolateral Artery (PLA) determines the coronary dominance.

• If the RCA supplies both these arteries, the coronary circulation can be classified as "right-dominant".
• If the LCX supplies both these arteries, the coronary circulation can be classified as "left-dominant".
• If the RCA supplies the PDA and the LCX supplies the PLA, the circulation is known as "co-dominant".

This makes the posteromedial papillary muscle significantly more susceptible to ischemia. The clinical significance of this is that a myocardial infarction involving the PDA is more likely to cause mitral regurgitation.

If you or anyone else you know has any of the risk factors related to heart disease destroying their coronary circulation, please don't delay, please begin living heart healthy lifestyle now.

Anything we do to prevent damaging our coronary circulation is something we will be grateful for as long as we live.

The Coronary Circulation

• The Coronary Anatomy
  • The left coronary artery
  • The right coronary artery
  • Coronary artery dominance

  This article is licensed under the GNU Free Documentation License, it uses material from the Wikipedia free encyclopedia coronary circulation article.