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Flashcards in blood supply to the heart Deck (17)
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1
Q

the right and left coronary arteries arise from?

A

the aorta just superior to the aortic valve

2
Q

the right and left coronary arteries travel where?

A

within the coronary sulcus

3
Q

what are the 3 branches of the right coronary artery?

A

sinuatrial nodal artery- natural pace maker of the heart
right marginal artery
posterior interventricular artery

4
Q

what are the 3 branches of the left coronary artery?

A

anterior interventricular artery
circumflex
-branch of circumflex- left marginal- supplies left ventricle

5
Q

right coronary dominance is in what percentage of individuals?

A

70%

6
Q

left coronary dominance is in what percentage of individuals?

A

30%

7
Q

dominance is significant for what?

A

when someone has an MI

8
Q

what does the right coronary artery usually supply?

A

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

9
Q

what does the left coronary artery usually supply?

A

left atrium
most of left ventricle
part of right ventricle
anterior 2/3 of inter ventricular septum

10
Q

which artery always supplies a greater portion of the heart’s tissue?

A

left coronary artery

11
Q

branches of coronary arteries are generally considered to be?

A

end arteries

12
Q

where do the anastomoses occur between?

A

right coronary and circumflex arteries

anterior and posterior interventricular arteries

13
Q

what is the largest vein of the heart?

A

coronary sinus

14
Q

which vein lies within the coronary sulcus and drains into the right atrium- has a rudimentary valve

A

coronary sinus

15
Q

what are the 5 tributaries of the coronary sinus?

A

great, middle and small cardiac veins
posterior vein of left ventricle
oblique vein of left atrium- large and important in utero

16
Q

which vein drains directly into the right atrium?

A

anterior veins of the right ventricle

17
Q

which are the smallest veins of the heart?

A

venae cordis minimae- primarily drain into right atrium