Anatomy

Question 1

name the 6 coronary arteries

Answer 1

rca, lca, lcx, lad,rma, lma, posterior interventricular artery

Question 2

SA and AV nodes are supplied by

Answer 2

RCA

Question 3

if you have an infarct of the RCA, what will happen to SA and AV nodes?

Answer 3

nodal dysfunction (bradycardia or heart block)

Question 4

Right dominant circulation is seen in what % of people

Answer 4

85%

Question 5

R dominant circulation

Answer 5

this is when the PDA rises from the RCA

Question 6

Left dominant circulation is seen in what % of people

Answer 6

8%

Question 7

L dominant circulation

Answer 7

this is when the PDA arises from the LCX

Question 8

Codominant circulation occurs in what % of the population

Answer 8

7%

Question 9

Codominant circulation

Answer 9

arises from both the LCX and RCA

Question 10

where does coronary occlusion most commonly occur?

Answer 10

LAD

Question 11

When does coronary blood flow peak?

Answer 11

in early diastole

Question 12

The most posterior part of the heart is the

Answer 12

left atrium

Question 13

if you have an enlargement of the left atrium it can cause:

Answer 13

dysphagia (due to compression of the esophagus) or hoarseness (due to compression of the left recurrent laryngeal nerve, a branch of the vagus)

Question 14

occlusion of the RCA results in

Answer 14

transmural ischemia of the inferior wall of the left ventricle –> ST elevation in leads II, III aVF as well as possible sinus node dysfunction

Question 15

PDA supplies

Answer 15

most of the inferior wall of the left ventricle, which forms the diaphragmatic surface of the heart; supplies posteriors 1/3 of inter ventricular septum, posterior walls of ventricles, and posteromedial papillary muscle

Question 16

LAD supplies

Answer 16

anterior 2/3 of interventiruclar septum, anterolateral papillary muscle, and anterior surface of left ventricle

Question 17

LCS supplies

Answer 17

lateral and posterior walls of left ventricle, anterolateral papillary muscle

Question 18

right (Acute) marginal artery supplies

Answer 18

right ventricle

Question 19

how is the IVC formed?

Answer 19

union of the right and left common iliac veins at the level of L4- L5

Question 20

LAD occlusion would result in

Answer 20

anteroseptal transmural ischemia with ST elevations in leads V1-V4

Question 21

LCX occlusion would result in

Answer 21

ischemia of the lateral wall of the left ventricle with ST elevations in V5 and V6

Question 22

the LCA gives off which 2 branches

Answer 22

LCX and LAD