blood supply to the heart Flashcards
the right and left coronary arteries arise from?
the aorta just superior to the aortic valve
the right and left coronary arteries travel where?
within the coronary sulcus
what are the 3 branches of the right coronary artery?
sinuatrial nodal artery- natural pace maker of the heart
right marginal artery
posterior interventricular artery
what are the 3 branches of the left coronary artery?
anterior interventricular artery
circumflex
-branch of circumflex- left marginal- supplies left ventricle
right coronary dominance is in what percentage of individuals?
70%
left coronary dominance is in what percentage of individuals?
30%
dominance is significant for what?
when someone has an MI
what does the right coronary artery usually supply?
right atrium
right ventricle
diaphragmatic surface of left ventricle
posterior 1/3 of inter ventricular septum
*conduction system to proximal parts of right and left bundle branches- controls rhythmic breathing
what does the left coronary artery usually supply?
left atrium
most of left ventricle
part of right ventricle
anterior 2/3 of inter ventricular septum
which artery always supplies a greater portion of the heart’s tissue?
left coronary artery
branches of coronary arteries are generally considered to be?
end arteries
where do the anastomoses occur between?
right coronary and circumflex arteries
anterior and posterior interventricular arteries
what is the largest vein of the heart?
coronary sinus
which vein lies within the coronary sulcus and drains into the right atrium- has a rudimentary valve
coronary sinus
what are the 5 tributaries of the coronary sinus?
great, middle and small cardiac veins
posterior vein of left ventricle
oblique vein of left atrium- large and important in utero
