EMG Diagnoses

Question 1

Left Axis Deviation

Answer 1

Lead I and II away from eachother

< >

Question 2

Right Axis Deviation

Answer 2

I and II towards each other

> <

Question 3

Normal Axis

Answer 3

I and II in same direction
^ ^
^ ^

Question 4

In which leads will you see a Inferior Wall Infarct?

Which vessel?

Answer 4

II
III
aVF
(X) Right CA

Question 5

In which leads will you see a Lateral Wall Infarct?

Which vessel?

Answer 5

I
aVL
V5, V6
(X) Left Circumflex A

Question 6

In which leads will you see an Anterior Wall Infarct?

Which vessel?

Answer 6

V2-V4

(X) LAD

Question 7

Which part of EKG wave corresponds to the Q wave?

When does this change happen?

Answer 7

Infarction

• hrs after= as ischemia progresses< injury> infarction (tissue death)
• present months/years after

Question 8

Which part of EKG wave corresponds to an ST elevation?

When does this change happen?

Answer 8

Injury

-w/i hrs= as tissue injury/damage occurs from ischemia (before infarction)

Question 9

Which part of EKG wave corresponds to inverted T wave?

When does this change happen?

Answer 9

Ischemia

-immediately before MI and/or hrs/days after> weeks

Question 10

How do you calculate HR from EKG?

Answer 10

HR= 1500/# mm btwn R waves

HR= 300-150-100-75-60-50

Irregular HR= (#beats/6sec)x10