What determines left or right heart dominance?

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.

Which heart dominance is better?

Most hearts (80-85%) are right dominant where the PDA is supplied by the right coronary artery (RCA).

What are patients with left dominant circulation at risk for?

A left dominant coronary artery system is associated with a significantly increased risk of 30-day mortality and early reinfarction after STEMI.

What is right dominance and left dominance?

The theory is that people are either left-brained or right-brained, meaning that one side of their brain is dominant. If you’re mostly analytical and methodical in your thinking, you’re said to be left-brained. If you tend to be more creative or artistic, you’re thought to be right-brained.

How is cardiac dominance determined?

Determination of cardiac dominance is through cardiac catheterization which involves insertion of a catheter into the ostium of the left main coronary artery, and the right coronary and injection of radiocontrast dye to allow visualization of coronary arteries.

What is right dominant circulation in heart?

Introduction. 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.

Is a left dominant heart bad?

The main finding of this study is that a left dominant system is associated with increased risk of cardiac mortality, heart failure, non-fatal myocardial infarction, revascularization, stroke or transient ischemic attacks shortly after primary PCI during hospital stay and at 3 months follow-up after STEMI.

Which artery of heart is responsible for cardiac dominance?

There have been physiologic variants described in case reports such as an origin from the left anterior descending artery, referred to as “superdominant.”[1][2][3] Estimates are that 70 to 80% of the population is right heart dominant with the posterior descending artery originating from the right coronary artery.

Why is the left coronary artery more important?

The left main coronary artery supplies blood to the left side of the heart muscle (the left ventricle and left atrium). The left main coronary divides into branches: The left anterior descending artery branches off the left coronary artery and supplies blood to the front of the left side of the heart.

When does a coronary artery have ” left ” dominance?

A coronary artery is said to have “left” dominance when the left posterior descending artery (CD or LPDA), the circumflex inferior artery (CI) and the circumflex posterior (CP) artery all arise from the circumflex artery (CX).

Which is the left dominant branch of the heart?

Left Dominance. In balanced dominant anatomy, it is the distal most branch arising from the circumflex, while in left dominant anatomy it arises proximal to the origin of the left posterior descending artery. When present, it is one of the three longest branches on the inferior wall of the heart.

Which is the most dominant heart in the world?

There have been physiologic variants described in case reports such as an origin from the left anterior descending artery, referred to as “superdominant.” Estimates are that 70 to 80% of the population is right heart dominant with the posterior descending artery originating from the right coronary artery.

Which is the most dominant artery in the body?

The vessel most commonly originates from either the right coronary artery (right dominant), left circumflex artery (left dominant), or both (codominant). There have been physiologic variants described in case reports such as an origin from the left anterior descending artery, referred to as “superdominant.”