5 Questions
What determines the dominance of the coronary arteries?
The origin of the posterior interventricular artery
Which branch of the right coronary artery accompanies the small cardiac vein?
Right marginal branch
What is the significance of dominance in the coronary arteries?
Describes which coronary artery is responsible for supplying most of the heart structures
Which vein is a continuation of the great cardiac vein?
Coronary sinus
Which coronary artery supplies the SA node?
Right coronary artery
Study Notes
Dominance of Vascular Supply
- Vascular supply to the heart can be right or left dominant.
- Dominance is determined by the origin of the posterior interventricular artery.
- Dominance describes which coronary arteries supply most of the heart structures.
Significance of Dominance
- Dominance is significant for the supply of the conduction system.
Coronary Arteries and Accompanying Veins
- Right coronary artery:
- Main branch of right coronary artery accompanies small cardiac vein.
- SA nodal branch accompanies right marginal vein.
- Inferior (Posterior) interventricular branch accompanies middle cardiac vein.
Left Coronary Artery
- Anterior interventricular branch accompanies great cardiac vein.
- Circumflex branch is a continuation of the great cardiac vein into the coronary sinus.
Determine the dominance of coronary arteries and their role in supplying the heart structures, including the significance for the conduction system.
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