Thorax 5: Coronary Circulation

Question 1

What percentage of people will have a SA nodal coronary branch

Answer 1

60%

Question 2

Where do the right and left coronary arteries anastamose

Answer 2

coronary sulcus and apex on the posterior and inferior surfaces

Question 3

obstruction of which artery will cause an inferior infarct?

Answer 3

RCA

Question 4

which artery supplies the SA and AV nodes?

Answer 4

RCA

Question 5

what supplies the posterior part of the IV septum

Answer 5

RCA

Question 6

what is the diagonal coronary artery a branch of?

Answer 6

Left anterior descending

Question 7

what branch may the circumflex artery give?

Answer 7

left marginal?

Question 8

which artery is most commonly affected by atherosclerosis?

Answer 8

LAD

Question 9

which obstruction causes an anterior infarct?

Answer 9

LAD

Question 10

which obstruction causes a lateral infarct?

Answer 10

Circumflex

Question 11

which artery is known as the artery of sudden death and why?

Answer 11

LAD as it causes catastrophic loss of left ventricle function

Question 12

What percentage of people will be right dominant?

Answer 12

66%

Question 13

Which cardiac vein accompanies which coronary artery?

Answer 13

Great cardiac with LAD
middle cardiac with posterior IV artery
small cardiac with right marginal

Question 14

which cardiac veins drain independently?

Answer 14

anterior cardiac veins and venae cordis minimi

Question 15

Where is the cardiac plexus found?

Answer 15

inferior to the aortic arch adjacent to the bifurcation of the PT and trachea

Question 16

What level does sympathetic innervation of the heart arise from?

Answer 16

T1-4

Question 17

where is cardiac pain referred

Answer 17

anterior chest wall and possible medial aspect of left arm