Arterial supply, venous and lymphatic drainage of the heart Flashcards
what is the heart wall supplied by
left and right coronary arteries and their anastomosing branches.
where is the heart drained by
cardiac veins almost entirely into the coronary sinus (a wide venous channel on the posterior surface of the heart, lying just below the left atrium), which in turn feeds into the right atrium.
what are the coronary arteries and cardiac veins are embedded in
the epicardium of the heart wall, usually surrounded by varying amounts of fat.
where do the coronary arteries and vessels lie
in both the atrioventricular (=coronary) sulcus and the interventricular sulci (=grooves) that groove the heart wall epicardium.
what is the location of the atrioventricular groove
encircles the heart between the atria and ventricles.
what is the location of the inter ventricular groove
lie between the two ventricles.
where does the anterior inter ventricular groove continue to
the diaphragmatic surface of the heart where it is now called the posterior interventricular groove.
grooves of the heart wall
where do the left and right coronary arteries arise from
left and right aortic sinuses
where do the left and right coronary arteries arise from
left and right aortic sinuses
In which part of the aorta (ascending aorta/ aortic arch/ descending aorta) are the aortic sinuses found?
Aortic root: The root is the first part of the ascending aorta, closest to the aortic valve.
It includes the aortic sinuses, which are bulb-shaped cavities from which the right and left coronary arteries arise
What are the 2 main branches given off by the RCA?
- right marginal a.
- posterior interventricular a.
What are the 2 main branches given off by the LCA?
- left. anterior descending a.
- circumflex a.
The coronary arteries are “end arteries”. What is meant by the term “end artery”?
artery that is the only supply of oxygenated blood to a portion of tissue. Arteries which do not anastomose with their neighbors are called end arteries
- The anterior interventricular artery (AIV) and posterior interventricular artery (PIV) are frequently referred to by clinicians as the left anterior descending artery (LAD) and the posterior descending artery (PDA), respectively.
cardiac veins
carry blood with a poor level of oxygen, from the myocardium to the right atrium.
where do the main cardiac veins lie
alongside the coronary arteries in the coronary and interventricular grooves.
where do most of the coronary veins return to
the right atrium through the coronary sinus.
Heart veins that go into the coronary sinus:
great cardiac vein, middle cardiac vein, small cardiac vein.
Great cardiac vein lies alongside
ant interventricular a.
Middle cardiac vein
lies alongside post interventricular a.
Small cardiac vein lies alongside
r. marginal a.
All above(great, middle, small cardiac vein) drain into the coronary sinus .
lying alongside the circumflex a
where does the coronary sinus drain into
right atrium
Ant cardiac veins
drain directly into right atrium
where does lymph from heart wall drain into
the tracheobronchial, bronchopulmonary and paratracheal lymph nodes, ie.,
the same as the lungs (see below diagram).
