Advanced Coronary Arteries Quiz

Q1. Which portion of the interventricular septum is mainly supplied by the LAD?

• Entire septum exclusively
• Posterior one-third only
• Anterior two-thirds
• Membranous septum only

Q2. Which artery usually supplies the posterior one-third of the interventricular septum?

• Diagonal artery
• Right marginal artery
• Conus artery
• Posterior interventricular artery

Q3. At which landmark does the AV nodal artery commonly arise?

• Cardiac apex
• Crux of the heart
• Pulmonary valve
• Left auricle

Q4. Which structures define the crux of the heart?

• Aorta and pulmonary trunk
• Two ventricular outflow tracts
• Two atrial appendages
• Coronary and posterior interventricular sulci

Q5. Why is proximal left main coronary obstruction especially serious?

• It threatens a large myocardial territory
• It supplies only the right atrium
• It supplies only the SA node
• It drains the coronary sinus

Q6. During which phase is left coronary blood flow generally greatest?

• Ventricular systole
• Atrial systole only
• Ventricular diastole
• Isovolumetric contraction only

Q7. Why is left coronary flow reduced during ventricular systole?

• The pulmonary valve obstructs flow
• Myocardial contraction compresses vessels
• The aortic valve closes
• The coronary ostia disappear

Q8. Which vessels can provide collateral connections between coronary territories?

• Pulmonary veins only
• Venae cavae
• Coronary arterial branches
• Azygos veins

Q9. Which coronary branch runs with the great cardiac vein in the anterior interventricular sulcus?

• Anterior interventricular artery
• AV nodal artery
• SA nodal artery
• Right marginal artery

Q10. Which coronary branch runs with the middle cardiac vein in the posterior interventricular sulcus?

• Right marginal artery
• Diagonal artery
• Posterior interventricular artery
• Circumflex artery