Deck 3: Lead Morphology and Placement

Question 1

An impulse that travels away from a positive electrode will write a(n)________ on the EKG.

A)positive QRS complex
B)negative QRS complex
C)isoelectric QRS
D)flat line

Answer 1

B

Question 2

Lead I connects which limbs?

A)Right arm and left leg
B)Right arm and right leg
C)Right arm and left arm
D)Left arm and right leg

Answer 2

C

Question 3

V₁ through V₆ are the

A)bipolar leads.
B)frontal leads.
C)augmented leads.
D)precordial leads.

Answer 3

D

Question 4

Augmented leads are

A)the same as bipolar leads.
B)leads in which the EKG machine must increase the voltage.
C)the same as precordial leads.
D)Leads I,II,and III.

Question 5

AVL has its positive pole on the

A)left arm.
B)right leg.
C)right arm.
D)left leg.

Question 6

In which lead should the tallest QRS complex be seen?

A)Lead I
B)Lead II
C)Lead III
D)aVF

Question 7

Which of the following is NOT a precordial lead?

A)V₆
B)aVR
C)V₅
D)V₁

Question 8

The V₁ electrode is located at the

A)first intercostal space,left sternal border.
B)fifth intercostal space,left sternal border.
C)fourth intercostal space,right sternal border.
D)fourth intercostal space,left sternal border.

Question 9

AVR has its positive pole on the

A)left arm.
B)right leg.
C)right arm.
D)left leg.

Question 10

Bipolar leads

A)have a positive pole and a negative pole.
B)have a positive pole and a central terminal acting as negative pole.
C)join leads on the back of the body with leads on the front.
D)are leads V₁ through V₆.

Question 11

The precordial leads are located on the

A)arms.
B)legs.
C)back.
D)chest.

Question 12

Joining leads I,II,and III at their ends produces

A)the triaxial diagram.
B)the hexiaxial diagram.
C)Einthoven's triangle.
D)the precordial leads.

Question 13

Which of the following is NOT a bipolar lead?

A)Lead II
B)AVF
C)Lead I
D)Lead III

Question 14

Lead III connects which limbs?

A)Right arm and left leg
B)Right arm and right leg
C)Right arm and left arm
D)Left arm and left leg

Question 15

AVF's negative reference point is formed by finding the midway point between which limbs?

A)Right arm and right leg
B)Left arm and left leg
C)Right arm and left arm
D)Left arm and right leg

Question 16

In the precordial leads,V₁'s QRS complex

A)should be a primarily negative deflection.
B)should be a primarily positive deflection.
C)should be isoelectric.
D)represents atrial depolarization.

Question 17

Lead II connects which limbs?

A)Right arm and left leg
B)Right arm and right leg
C)Right arm and left arm
D)Left arm and right leg

Question 18

AVF

A)is a bipolar lead.
B)is a precordial lead.
C)is an augmented lead.
D)has its positive pole on the left arm.

Question 19

Einthoven's law states that

A)Lead I + Lead III = Lead II.
B)Lead II + Lead III = Lead I.
C)V₁ + V₅ = V₄.
D)Lead I + Lead II = Lead III.

Question 20

Which of the following is NOT a lead comprising the hexiaxial diagram?

A)Lead I
B)V₃
C)aVR
D)Lead III

Question 21

If Lead I's QRS is positive,the heart's current is traveling toward the right arm.

Question 22

It is abnormal for the QRS to be negative in aVR.

Question 23

In what way are augmented leads manipulated when they are printed?

A)They are printed on special EKG paper with only big boxes and no little boxes.
B)They are printed on special EKG paper with only little boxes and no big boxes.
C)Their size is decreased in order to fit them onto the EKG paper.
D)Their size is increased so they are large enough to record on EKG paper.

Question 24

The electrode on the right leg is the ground electrode and plays no part in any lead.

Question 25

How does the EKG machine increase the size of waves and complexes in augmented leads?

A)It increases the voltage.
B)It decreases the voltage.
C)It eliminates the positive pole.
D)It eliminates the negative pole.

Question 26

The precordial leads are placed on the arms and legs.

Question 27

In which of the following leads should the QRS complex be negative?

A)Lead I
B)Lead II
C)aVR
D)aVL

Question 28

The normal QRS deflection in Lead III should be negative.

Question 29

Which of the following leads would be most appropriate for continuous monitoring of an individual with an abnormality in ventricular conduction?

A)Lead II
B)MCL₁
C)AVR
D)V₄

Question 30

If Lead aVR's QRS is positive,the heart's current would be traveling toward the

A)right arm.
B)left arm.
C)right leg.
D)left leg.

Question 31

Einthoven's triangle is formed by joining leads I,II,and III at their ends.

Question 32

The structure formed by joining all the frontal leads at the center is the hexiaxial diagram.

Question 33

Why is it advantageous to use Lead II for continuous monitoring?

A)It is located at the most comfortable location for the patient.
B)It provides excellent views of P waves and QRS complexes.
C)It provides the clearest hexiaxial and triaxial diagrams.
D)It does not require the right leg to serve as the ground.

Question 34

Which of the following will produce a positive QRS complex?

A)An electrical impulse traveling toward a positive electrode
B)An electrical impulse traveling away from a positive electrode
C)An electrical impulse traveling at a right angle to a positive electrode
D)An electrical impulse traveling at a 45 degree angle to a positive electrode

Question 35

The normal QRS complex deflection is positive in leads I and aVF.

Question 36

A positive QRS complex is written by an impulse that travels toward the positive electrode.

Question 37

If Lead II's QRS complex is positive,the heart's current is traveling toward the

A)right arm.
B)left arm.
C)right leg.
D)left leg.

Question 38

The bipolar lead formed by joining the right arm and right leg is

A)Lead I.
B)Lead II.
C)Lead III.
D)There is no such lead.

Question 39

How is the hexiaxial diagram used?

A)It is used to determine the size of the QRS complex.
B)It is used to determine the frequency of P waves.
C)It is used to determine the direction of current flow in the heart.
D)It is used to determine if the leads were placed on the correct limb.

Question 40

The QRS complex should be positive in which of the following leads?

A)AVR
B)V₁
C)V₆
D)V₂

Question 41

V₅'s QRS complex should be primarily ________.

Question 42

Based on Einthoven's Law,the shortest QRS complex should NOT be in Lead ________.

Question 43

Einthoven's law states that ________.

Question 44

In the precordial leads,we look at current flow in the ________ plane.

Question 45

A lead is an electrocardiographic ________.

Question 46

It is normal for the QRS complex to be primarily positive in V₁.

Question 47

The ________ is the structure obtained from joining leads I,II,and III at the middle.

Question 48

Lead III measures the current traveling between the ________.

Question 49

Normal current of the heart travels top to bottom and ________.

Question 50

The difference between unipolar and bipolar leads is that ________ involves two limbs.

Question 51

The cardiac research pioneer whose work resulted in the law stating that Lead I + Lead III = Lead II is ________.

Question 52

Lead aVR's positive electrode is located on the ________.

Question 53

A ________ is an arrow that depicts the general direction of current flow.

Question 54

An impulse traveling at a right angle to the positive electrode writes ________ on the EKG paper.

Question 55

V₁'s lead is located at the ________.

Question 56

Lead aVF's positive electrode is located on the ________.