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Questions and Answers
What determines the dominance of the coronary arteries?
What determines the dominance of the coronary arteries?
- The number of cardiac veins
- The origin of the posterior interventricular artery (correct)
- The origin of the anterior interventricular artery
- The size of the right coronary artery
Which branch of the right coronary artery accompanies the small cardiac vein?
Which branch of the right coronary artery accompanies the small cardiac vein?
- Posterior interventricular branch
- Anterior interventricular branch
- Right marginal branch (correct)
- Circumflex branch
What is the significance of dominance in the coronary arteries?
What is the significance of dominance in the coronary arteries?
- Describes which coronary artery is responsible for supplying most of the heart structures (correct)
- Determines the origin of the circumflex artery
- Describes the veins accompanying the coronary arteries
- Determines the supply of the SA node
Which vein is a continuation of the great cardiac vein?
Which vein is a continuation of the great cardiac vein?
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Which coronary artery supplies the SA node?
Which coronary artery supplies the SA node?
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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.
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Description
Determine the dominance of coronary arteries and their role in supplying the heart structures, including the significance for the conduction system.
