What artery determines dominance?
posterior descending artery
Coronary arterial dominance is defined by the vessel which gives rise to the posterior descending artery (PDA), which supplies the myocardium of the inferior third of the interventricular septum. Most hearts (80-85%) are right dominant where the PDA is supplied by the right coronary artery (RCA).
What is the difference between right dominant and left dominant coronary circulation?
In a right-dominant circulation, the right coronary artery (RCA) supplies the posterior portion of the interventricular septum and gives off the posterior descending artery. This contrasts with a left-dominant circulation, in which the left circumflex (LCX) artery supplies this territory.
How do you know if a heart is right or left dominant?
Heart “dominance” is determined by which of the initial coronary arteries supplies the PDA which, in turn, supplies the AV node. The heart is right dominant (85%) if the PDA is supplied by the RCA. The heart is left dominant (7.5%) if the PDA is supplied by the circumflex branch of the LCA.
What structure does the circumflex artery supply?
The circumflex artery branches off the left coronary artery and encircles the heart muscle. This artery supplies blood to the outer side and back of the heart.
What is Codominance in coronary artery?
A coronary artery is said to have a “co-dominance” or balanced dominance when only the right posterior descending artery (RD or RPDA) arises from the right coronary artery (RCA), while the circumflex inferior artery (CI) and the circumflex posterior artery (CP) arise from the circumflex artery (CX).
What is co dominant coronary circulation?
Co-dominant coronary circulation is defined as , when posterior crux of the heart receives twigs from both right and left system making this water shed area with advantage of twin innervation.
What is codominant coronary circulation?
What is a codominant heart?
What does left circumflex artery supply?
The circumflex artery is responsible for blood supply to the left atrium and the posterior-lateral aspect of the left ventricle while the LAD supplies blood to the anterior portion of the left ventricle.
What is the role and pathway of the circumflex artery?
The circumflex artery curves to the left around the heart within the coronary sulcus, giving rise to one or more left marginal arteries (also called obtuse marginal branches (OM)) as it curves toward the posterior surface of the heart. It helps form the posterior left ventricular branch or posterolateral artery.
What is non dominant right coronary artery?
Non-dominant RCA is small in diameter and supplies right atrium (RA), right ventricle (RV) and sino- atrial (SA) node. Although a significant atherosclerotic disease of NDRCA in the absence of significant left coronary artery disease is rare, isolated occlusion of NDRCA has been described in past.
What is meant by left artery dominance?
A: “Dominance” is defined in terms of which coronary artery supplies the posterior descending artery (PDA), which travels along the inferior interventricular groove from the crux of the heart to the apex, as well as the posterior left ventricular braches.