EP Anatomy

  1. By what does the cardiac myocardium drain?
    Two groups of veins: the tributaries of the greater and smaller cardiac veins (the Thebesian veins)
  2. Into what vein does the anterior wall drain?
    anterior interventricular vein, known as the great cardiac vein
  3. Next to what structure does the Great Cardiac Vein run?
  4. What does the great cardiac vein join to become the coronary sinus?
    main posterior lateral vein
  5. What is the vein of Marshall?
    A remnant of the left superior vena cava; drains the atrial directly into the CS
  6. For what is the Thebesian system responsible?
    Draining the inner layers of the myocardium of the right ventricular venous system and portions of the interventricular septum directly into the right ventricle via orifices that are often ,0.5 mm in diameter.
  7. What embryologic structure becomes the smooth portion of the SVC?
    right horn of the sinus venosus
  8. What embryologic structure becomes the CS?
    left horn of the sinus venosus
  9. What is the valve of Vieussen's?
    anatomic landmark that separates the great cardiac vein from the coronary sinus; present in 80-90% of people; 1-3 leaflets
  10. What tissue makes up the wall of the CS?
    striated myocardium that is continuous with the atrium
  11. Where is the Thebesian valve?
    CS ostium
  12. To where does the right ventricle drain?
    Directly into the right ventricle via the Thebesian veins
  13. Where is the CS ostium?
    posterior interatrial septum, anterior to the Eustachian ridge; posterior to the tricuspid annulus
  14. What electrophysiological activity does the CS have?
    It forms a connection between the right and left atria - may contribute to reentrant tachyarrhythmias
  15. What electrophysiological activity does the Vein of Marshall have?
    it may give rise to atrial fibrillation; it has rich autonomic innervation
Card Set
EP Anatomy
These are cards based on EP articles pertaining to anatomy