Chapter One

Question 1

Define Lead I

Answer 1

Left Arm Positive
Right Arm Negative
Angle of Orentation 0°

Question 2

Define Lead II

Answer 2

Legs Positive
Right Arm Negative
Angle of Orentation 60°

Question 3

Define Lead III

Answer 3

Legs Positive
Left Arm Negative
Angle of Orentation 120°

Question 4

The six leads placed across the chest are also known as the?

Answer 4

Precordial Leads

Question 5

Name the three heart cell types:

Answer 5

Pacemaker Cells
Electrical Conducting Cells
Myocardial Cells

Question 6

Name the three fascicles:

Answer 6

Septal
Anterior
Posterior

Question 7

What is it called when cardiac cells lose their internal negativity?

Answer 7

Depolarization

Question 8

What are the contractile proteins responsible for myocardial cell contraction?

Answer 8

Actin and Myosin

Question 9

Define aVR

Answer 9

Right Arm Positive
Other Limbs Negative
Angle of Orientation -150

Question 10

Define aVF

Answer 10

Legs Positive
Other Limbs Negative
Angle of Operation +90

Question 11

Define aVL

Answer 11

Left Arm Positive
Other Limbs Negative
Angle of Orientation -30

Question 12

What’s another name for leads II, III, AVF?

Answer 12

Inferior leads

Question 13

What’s another name for leads I and aVL?

Answer 13

Left lateral leads

Question 14

Define the PR Interval:

Answer 14

0.120 to 0.200

Start of the P Wave to the start of the Q Wave

Question 15

Define normal septal Q Wave amplitude:

Answer 15

Not greater than 0.1 mV.

Question 16

Define the normal range for the QRS complex.

Answer 16

0.06 to 0.100

Question 17

What is the normal height of a T Wave.

Answer 17

1/3rd to 2/3rds the height of the R Wave

Question 18

What is the normal axis of the heart?

Answer 18

+90 to -30

Question 19

Which direction does the septal fascicle depolarize the ventricular septum.

Answer 19

From left to right.

Question 20

V4 and V6 should be placed in which intercostal?

Answer 20

5th

Question 21

Define “R Wave” Progression

Answer 21

The pattern of progressively increasing R wave amplitude moving right to left in the precordial leads.

Question 22

Define “Transition Zone”

Answer 22

The QRS complex goes from being predominantly negative to predominantly positive. The normal transition zone occurs at leads V3 and V4.