Advanced Right Coronary Artery Quiz

Q1. In a right-dominant heart, a distal right coronary artery occlusion near the crux can directly compromise which combination?

• Inferior ventricular myocardium, posterior septum, and AV node
• Left atrial appendage exclusively
• Anterior septum and left ventricular apex exclusively
• Pulmonary trunk and aortic arch

Q2. Why can right coronary artery ischemia produce bradyarrhythmias in some patients?

• The right coronary artery forms the cardiac fibrous skeleton
• The right coronary artery commonly supplies the SA and AV nodes
• The right coronary artery carries parasympathetic nerve fibers
• The right coronary artery directly generates cardiac impulses

Q3. An occlusion of the right marginal artery would most directly threaten which myocardial territory?

• Right ventricular free wall
• Left atrial wall exclusively
• Left ventricular apex exclusively
• Anterior two-thirds of the interventricular septum

Q4. How does left coronary dominance alter the usual distal distribution of the right coronary artery?

• The right coronary artery becomes the anterior interventricular artery
• The right coronary artery does not provide the posterior interventricular artery
• The right coronary artery supplies the entire left ventricle
• The right coronary artery arises from the pulmonary trunk

Q5. Which branch may arise independently from the right aortic sinus rather than from the right coronary artery?

• Left marginal artery
• Circumflex artery
• Conus artery
• Anterior interventricular artery

Q6. A proximal right coronary artery occlusion occurring before the right marginal branch would threaten which territory more extensively than a distal occlusion?

• Entire left atrium exclusively
• Anterior two-thirds of the interventricular septum exclusively
• Pulmonary parenchyma
• A larger portion of the right ventricular myocardium

Q7. Which finding identifies a right-dominant rather than left-dominant coronary circulation?

• Posterior interventricular artery arising from the right coronary artery
• Anterior interventricular artery arising from the left coronary artery
• Right marginal artery arising from the right coronary artery
• Circumflex artery arising from the left coronary artery

Q8. Why is the crux of the heart clinically important when considering the right coronary artery?

• It contains the pulmonary valve
• It is a key region where important distal RCA branches arise in right dominance
• It is where the right coronary artery enters the right atrial cavity
• It is the origin of the ascending aorta

Q9. A patient with a right-dominant circulation has an occlusion of the posterior interventricular branch of the right coronary artery. Which septal territory is most directly at risk?

• No portion of the interventricular septum
• Anterior two-thirds of the interventricular septum
• Posterior one-third of the interventricular septum
• Entire interatrial septum

Q10. Which statement best integrates the anatomy of the right coronary artery?

• It arises from the pulmonary trunk and supplies only the right atrium
• It normally supplies the entire left ventricle and anterior interventricular septum
• It arises from the right aortic sinus, courses in the coronary sulcus, supplies much of the right heart, and commonly gives rise to the posterior interventricular artery
• It is a venous vessel that drains the right ventricle into the coronary sinus