EKG Intro

Question 1

Anteroseptal leads

Answer 1

V1 - V4

Question 2

Anterior Leads

Answer 2

V2 - V4

Question 3

Lateral Leads

Answer 3

I, AVL, V5, V6

Question 4

Inferior Leads

Answer 4

II, III, AVF

Question 5

Normal P wave length

Answer 5

Up to .12 seconds

3 small squares

Question 6

1 small square horizontal time

Answer 6

.04 seconds

Question 7

1 large square time

Answer 7

.2 seconds

Question 8

Normal PR interval

Answer 8

.12 - .2 seconds

Question 9

What does a P wave that is 1/3 the height of R wave mean?

Answer 9

Transmural MI

Question 10

J point

Answer 10

end of a QRS complex where it changes from vertical to horizontal

Question 11

QT segment

Answer 11

Measures the total duration of electrical activity of the ventricles.
Normally .34 - .43 seconds

Question 12

U wave

Answer 12

Represents repolarization of purkinjie fibers
Not always seen
Prominent U waves most often seen in hypOkalemia

Question 13

QRS Duration

Answer 13

Normal = .04 - .11 seconds (1-3 boxes)

Anything longer = BBB or intraventricular conduction delay

Question 14

QRS “rabbit ears” in V1 and V2 = ?

Answer 14

RBBB

Question 15

QRS voltage increases with?

Answer 15

LV Hypertrophy

Question 16

Precordial leads

Answer 16

V1 - V6