Exam 4 Lecture 5

Question 1

When should the EKG show no electrical current?

Answer 1

Between the end T-Wave and begin P-Wave

Question 2

Where are Leads V1 and V2 located
*V1
*V2

Answer 2

4th intercostal space on either side of the Sternum
*V1 - R side
*V2 - L side

Question 3

Inverted T-Wave
*Talk about Repolarization and Depolarization
*Which part of the heart repolarizes 1st in an Inverted T-Wave?

Answer 3

Depolarization and repolarization in the same direction
*In an Inverted T-Wave, repolarization happens endocardium to epicardium, which is reverse from normal

Question 4

Lead 2: Anterior Current of Injury
*Type of deflection

Answer 4

Negative Deflection

Question 5

Where are the electrodes placed for aVL
*What 2 standard leads does it look between

Answer 5

(+) L arm
(-) R arm and R leg
*Lead 1 and Lead 3

Question 6

Which Precordial Chest Lead shows the largest (+) deflection?
*Why

Answer 6

Lead 4
*Right towards the MEA in normal, healthy heart

Question 7

Which leads are the Anterior Leads?

Answer 7

Lead 3 and 4

Question 8

What are the Angle ranges for aVR

Answer 8

30 degrees to 210 degrees

Question 9

What are the 3 Augmented Leads?

Answer 9

aVF, aVL, aVR

Question 10

EKG Sign for BBB

Answer 10

“Bunny Ears”

Question 11

What are the angle ranges for aVF

Answer 11

90 to 270 degrees

Question 12

Where are the electrodes placed for aVF
*What 2 standard leads does it look between?

Answer 12

(+) L foot
(-) R arm and L arm
*Lead 2 and Lead 3

Question 13

What is a vector, per lecture?
*What 2 things are most important when looking at it

Answer 13

Line with an arrow at the end of it
*Angle and Size of Arrow

Question 14

What are the angle ranges for aVL

Answer 14

-30 to 150 degrees

Question 15

Where are the electrodes placed for aVR
*What is special about this lead
*(-) or (+) deflections?
*What 2 standard leads does it look between?

Answer 15

(+) R arm
(-) L Leg and L arm
*Used the least b/c of location
*Sees always (-) deflections due to location
*Lead 1 and Lead 2

Question 16

Which BBB would cause a L Axis Deviation?

Answer 16

LBBB

Question 17

What is special about Lead 2?
*Why is it able to do this?

Answer 17

Lead used to determine current of injury between anterior and posterior heart
*It is right in the middle of the cardiac muscle so can see multiple directions

Question 18

What is a Siliscope?

Answer 18

Old way to look at the Vectorcardiogram

Question 19

Where are Leads V4, V5, V6 located?

Answer 19

5th Intercostal Space on L side of Pt

Question 20

Which leads are the Lateral Leads

Answer 20

V5, V6

Question 21

Which BBB would cause a R Axis Deviation?

Answer 21

RBBB

Question 22

If there is a current of injury, where would it most likely show?

Answer 22

In place where we should have no current: end of T-Wave to beginning of P-Wave

Question 23

Where are the (-) leads for the Precordial Chest Leads?

Answer 23

RA, LA, LF

Question 24

Lead 2: Posterior Current of Injury
*Type of Deflection

Answer 24

Positive Deflection