Ischemia and Infarction

Question 1

artery that supplies 70% of the left ventricle and can lead to death if lost

Answer 1

left coronary artery

Question 2

artery that supplies the anterior portion of the left ventricle and the septum

Answer 2

left anterior descending artery

Question 3

artery that is referred to as the widowmaker

Answer 3

left anterior descending artery

Question 4

artery that supplies the posterior wall, parts of the lateral wall, and inferior wall

Answer 4

left circumflex artery

Question 5

artery that supplies the right ventricle, right atrium, and part of the septum

Answer 5

right coronary artery

Question 6

infarcts of this artery may result in severe right ventricle dysfunction, AV nodal block, and hypotension

Answer 6

right coronary artery

Question 7

artery that supplies the AV node, proximal bundle branches, inferior-posterior LV wall, and basal portion of the septum

Answer 7

right posterior descending artery

Question 8

what is the ECG distribution of RCA?

Answer 8

I think RC is A tier, but others think it is INFERIOR or POSTERIOR.

Question 9

what is the ECG distribution of LAD (left anterior descending)?

Answer 9

the LAD had a SEPTAL piercing on the ANTERIOR of his face

Question 10

what is the ECG distribution for LCX?

Answer 10

She played lacrosse (LCX) on the LATERAL field

Question 11

what does ischemia look like on ECG?

Answer 11

ST depression

Question 12

what does injury look like on ECG?

Answer 12

ST elevation

Question 13

what does infarction look like on ECG? (2)

Answer 13

ST elevation
Q wave

Question 14

in which leads will an anterior wall MI be shown?

Answer 14

V3 and V4

Question 15

in which leads will a lateral wall MI be shown?

Answer 15

V5, V6, I, and aVL

Question 16

in which leads will an inferior wall MI be shown?

Answer 16

II, III, and aVF

Question 17

in which leads would changes be shown in a right ventricular infarction?

Answer 17

V4R, V5R, V6R

Question 18

in which leads would changes be shown in a posterior wall MI?

Answer 18

V7-V10

Question 19

what is a good rule of thumb to determine when to obtain right-sided leads?

Answer 19

any time an inferior infarct is seen

Question 20

what is a good rule of thumb to determine when to obtain posterior leads?

Answer 20

ST depression in V1-V3 not associated with RBBB

Question 21

where do posterior leads come from?

Answer 21

move V4, V5, and V6 to spots for V7, V8, V9

Question 22

what is a symptom of right ventricular MI?

Answer 22

no blood pressure due to no return

Question 23

what is the criteria for right ventricular MI? (2)

Answer 23

inferior wall MI
ST elevation in V4R, V5R, V6R

Question 24

what does a posterior wall MI look like on ECG?

Answer 24

carousel pony in V1 or V2

Question 25

where would reciprocal changes be seen for a posterior MI?

Answer 25

V1-V3