EKG III

Question 1

In reciprocal ST depression, which leads show an ST elevation?

Answer 1

II, III, aVF

Question 2

In reciprocal ST depression, which leads show an ST depression?

Answer 2

I and aVL

Question 3

Give me the leads for the localization of an aneterior MI

Answer 3

V2, V3, V4 (at least 2)

Question 4

Give me the leads for the localization of an Anteroseptal MI

Answer 4

V1, V2, V3 (+- V4)

Question 5

Give me the leads for the localization of an Anterolateral MI

Answer 5

V4, V5, V6 (+- V3 or V2)

Question 6

Give me the leads for the localization of an Extensive anterior MI

Answer 6

V1-V6 (all)

Question 7

Give me the leads for the localization of an Lateral MI

Answer 7

V5, V6 (+- I or aVL)

Question 8

Give me the leads for the localization of a high lateral MI

Answer 8

I, aVL

Question 9

Give me the leads for the localization of an Inferior MI

Answer 9

II, III, aVF

Question 10

Give me the leads for the localization of an inferolateral MI

Answer 10

II, III, aVF, V6 (+- V5)

Question 11

Give me the leads for the localization of a Posterior MI

Answer 11

V1, V2

Question 12

Give me the leads for the localization of an Inferoposterolateral MI

Answer 12

II, III, AvF, V6, V1, V2

Question 13

Give me the leads for the localization of a Right ventricular MI

Answer 13

V4R, +V3R and/or V5R

Question 14

What is the shape of the ST segment in early repolarization that makes it differnet than Acute pericarditis or an MI?

Answer 14

It’s concave UPWARDS

Question 15

What happens with the PR interval with acute pericarditis?

Answer 15

It’s depressed.

That’s why you treat acute pericarditis with SSRI’s.

Question 16

What are the specific Sx of acute pericarditis which makes it distinguishable from early repolarization and acute MI?

Answer 16

sharp pain, improves with change in body position, flu-like Sx

Question 17

What can be goofy about the ST segment in inferior or high lateral wall MI’s?

Answer 17

Reciprocal ST depression

Question 18

Does a NSTEMI or STEMI give a Q wave MI after time?

Answer 18

STEMI

Question 19

Gonna be a long explanation, but tell me the reason why there are significant Q waves on EKG’s with some MI’s.

Answer 19

infarction on wall –> wall becomes dead and inert –> EKG reads through inert wall to other side –> other side depolarizing normally from endocardium to epicardium –> depolarization AWAY from + electrode –> large depression on Q wave.

Question 20

What are the 2 criteria for determining significant Q waves on EKG?

Answer 20

1. > 1mm wide

2. > 1/3 the amplitude of the QRS complex

Question 21

Give me the time when the following EKG characteristics occur for an MI:

Normal R wave, peaked ST segment, T wave

Answer 21

Acute MI (onset and first several hours)

Question 22

What wave diminishes after the first day in an MI?

Answer 22

R wave

Question 23

When does the T wave become inverted after the initial MI?

Answer 23

1st and 2nd days

Question 24

During the first and second days after an MI, is the ST segment still just as high as the original form, or has it decreased?

Answer 24

It decreased.

You bastard.

Question 25

Give me the time when the following EKG characteristics occur for an MI:

No R wave, deep Q wave, ST segment back to baseline, T wave inversion peresists.

Answer 25

after 2-3 days

Question 26

After several weeks-months, which waves persist?

Answer 26

Q waves and T wave inversion (but lessens a little)