Anatomy Topic 2 Case 5 Flashcards
Where does the right coronary artery arise?
- Right aortic sinus in the ascending aorta
Outline the course taken by the right coronary artery
- Descends vertically in coronary sulcus (between right atrium and ventricle)
- Turns posteriorly at the inferior margin onto the diaphragmatic surface and base of the heart
Outline the pathway taken by the atrial branch of the right coronary artery
- Passes in the groove between right auricle and ascending aorta
- Gives off sinu-atrial node which passes posteriorly around superior vena cava
Outline the pathway taken by the right marginal branch of the right coronary artery
- Approaches inferior margin of heart
- Towards apex of the heart
Outline the pathway taken by the posterior interventricular branch of the right coronary artery
- Lies in the posterior interventricular sulcus
Where does the left coronary artery arise?
- Left aortic sinus of ascending aorta
Outline the course taken by the left coronary artery
- Passes between pulmonary trunk and left auricle
- Enters coronary sulcus
Outline the course taken by the left anterior descending artery
- Continues around left side of pulmonary trunk
- Descends obliquely towards apex of the heart
- In the anterior interventricular septum
Outline the course taken by the circumflex artery
- Courses through coronary sulcus onto diaphragmatic surface
- Gives off left marginal artery
Identify the structures supplied by the right coronary artery
- Right atrium
- SA and AV nodes
- Posterior third of interventricular septum
- Diaphragmatic surface of right ventricle
Identify the structures supplied by the right coronary artery
- Left atrium
- Left ventricle
- Anterior two thirds of interventricular septum
- Anterior surface of right ventricle
Identify the course taken by the greater cardiac vein
- From apex it ascends in the anterior interventricular sulcus
- Turns to the left at the coronary sulcus and continues to the diaphragmatic surface of the heart
- Enlarges to form coronary sinus
- Which enters right atrium adjacent to inferior vena cava
Identify the course taken by the middle cardiac vein
- From apex it ascends in the posterior interventricular sulcus
- Towards coronary sinus
Identify the course taken by the small cardiac vein
- Begins in the lower anterior section of the coronary sulcus
- Continues in this groove onto the diaphragmatic surface of the heart
- Enters the coronary sinus at its atrial end.
- It may receive the right marginal vein.
Identify the course taken by the posterior cardiac vein
- Posterior surface of left ventricle to the left of the middle cardiac vein
- Enters coronary sinus or joints great cardiac vein