Basic Electrocardiogram

Question 1

What is depolarization?

Answer 1

electrical current moves sequentially through the heart muscle, changing cell to cell, from polarized to depolarized

Question 2

What is repolarization?

Answer 2

gives the cells in the ventricle the ability to depoloarize

Question 3

What are ectopic beats?
What are some examples?

Answer 3

abnormal beats
PVC’s, PAC’s

Question 4

What does precordial mean?

Answer 4

situated or occurs in front of the heart

Question 5

What is the order of electrical impulse being sent throughout the heart?

Answer 5

SA Node
AV Node
Bundle of His
Purkinje Fibers

Question 6

Which type of monitoring occurs in the cath or EP lab?

Answer 6

invasive

Question 7

Where do electrodes need to be placed on the patient?

Answer 7

in fatty NOT bony areas

Question 8

What do the leads give us? What are the ECG wires called?

Answer 8

different views of the heart
leads

Question 9

_____ are views of the heart?
What are the different leads?
How many different leads

Answer 9

Planes
Limb Lead; Precordial Leads
12 (6 of each)

Question 10

How many leads to 12-lead ECG’s have?
How many views of the heart does it give?

Answer 10

10 wires
12 views

Question 11

What do the limb and precordial leads show us?

Answer 11

Limb lead show us the frontal plane
Precordial leads show us the horizontal plane

Question 12

What are the different leads shown on 6 limbs compared to the 6 precordial?

Answer 12

Limb: I,II,III,AVF,AVL,AVR
Precordial: V1-V6

Question 13

How do hardwire and telemetry monitoring differ?

Answer 13

Hardwire is continuous monitoring and directly connected to monitor. Telemetry allows mobility

Question 14

What leads are on the inferior wall and what are these sensors connected to?

Answer 14

II,III, AVF
Right Coronary Artery

Question 15

What leads are on the lateral wall and what are these sensors connected to?

Answer 15

I, V5-V6, AVL
Circumflex

Question 16

What leads are on the anterior wall and what are these sensors connected to?

Answer 16

V1-V4
Left Anterior Descending Artery

Question 17

What is important when it comes to electrodes? Where should they be located?

Answer 17

Placement is important
On the intercostal spots, fatty areas, no bony areas

Question 18

Draw a Einthoven Triangle on a blank paper

Question 19

All leads are (fill in the blank) and (fill in the blank).

Answer 19

numbered and colored