EKG lecture 2 highlights

Question 1

EKG electrodes are designated negative & positive by what?

Answer 1

the machine

Question 2

True or false: Leads are NOT same as electrodes

Answer 2

True

Question 3

List the positions of all the EKG leads around the heart

Answer 3

Question 4

What are the 3 inferior leads? List their degrees

(starred)
slide 19

Answer 4

1) Lead II
2) Lead III
3) Lead AVF

Question 5

What are the 2 left lateral leads?

(starred)

Answer 5

1) Lead 1
2) Lead aVL

Question 6

What is the one right sided lead?

(starred)

Answer 6

Lead aVR

Question 7

List the following groups of leads:
1) Anterior
2) Left lateral
3) Inferior
4) Right ventricular
(starred)

Answer 7

1) V2, V3, V3
2) I, aVL, V5, V6
3) II, III, aVF
4) aVR, V1

Question 8

EKG leads record the ________ current flow or __________

Answer 8

average; vector

Question 9

P wave: __________ of atrial depole points right to left & slightly inferior

Answer 9

VECTOR

Question 10

P wave amplitude normally does not exceed ______ mm or 0.25 mV

Answer 10

2.5 (2.5 small boxes)

Question 11

Would you expect aVR lead P waves to be positive or negative?

Answer 11

Negative

Question 12

Would you expect lead 2 P waves to be positive or negative?

Answer 12

Positive

Question 13

What does the PR interval represent?
What does the PR segment represent?

Answer 13

1) P wave + PR segment (contraction and pause)
2) Just the pause