Electocardiogram (ECG)

Question 1

Electrocardiogram

ECG or EKG

Answer 1

Graphic representation of the electrical activity that passes through the heart

Question 2

What level does the electrical activity of the heart begin?

Answer 2

The electrical activity of the heart begins at the cellular level. Then follows the conductive pathway, bringing about the cardiac cycle which results in the heart pumping blood throughout the body.

Question 3

Cardiac Polarity

Answer 3

Electrical status of cardiac muscle cells

Question 4

Polarization

Answer 4

Resting cardiac muscle cells

Question 5

Depolarization

Answer 5

Charged and contracting cardiac muscle cells

Question 6

Repolarization

Answer 6

Recovering cardiac muscle cells and returning to equilibrium

Question 7

What is the cardiac cycle?

Answer 7

The pumping of the heart in rhythmic cycle of contraction and relaxation.

(“Lub-dub” sound)

Question 8

Adult heart rate

Answer 8

60-100 Bpm

Question 9

ECG complex is what?

Answer 9

A full cardiac electrical cycle represented by PQRST waves working together as a complex

Question 10

P wave is…

Answer 10

And upward curve resenting atrial contraction used to measure the arterial rate

Question 11

Q wave is…

Answer 11

A downward deflection after the P wave

Question 12

R wave is…

Answer 12

A large upward spike after the Q wave

Question 13

S wave is…

Answer 13

A downward deflection after the R wave

Question 14

T wave is…

Answer 14

And upward curve after the S wave. Representing the repolarization and resting of the ventricle

Question 15

U wave is …

Answer 15

A small upward curve sometimes following the T wave. Representing slow repolarization a return to resting

Question 16

What is the QRS complex?

Answer 16

The QRS waves representing contraction of the ventricles

Question 17

What is the PR interval?

Answer 17

The P-wave in the line connecting it to the QRS complex. Representing the time the electrical impulse travels from the sinoatrial (SA) node to the atrioventricular (AV) node.

Question 18

What is the QT interval?

Answer 18

The QRST waves were presenting a full cardiac electrical cycle

Question 19

What is the ST segment?

Answer 19

A slight upward line connecting the QRS waves to the T wave and representing the time between contraction of the ventricles and relaxation or recovery

Question 20

4 types of ECG’s:

Answer 20

1) Single-lead
2) 12 lead
3) Telemetry
4) Interpretive

Question 21

What is a single lead ECG?

Answer 21

Info recorded from one view of the heart.

Question 22

What’s a 12 lead ECG?

Answer 22

Info recorded from 10 electrodes.

Representing 12 views of the ❤️from 12 angles.

Question 23

What is a telemetry ECG?

Answer 23

A single lead or 12 lead transmitted by radio, electronic or telephone waves to another site for monitoring or reading

Question 24

Interpretive ECG is a…

Answer 24

Computerized ECG programed to analyze data & produce a printed interpretation.

Question 25

Placement of electrodes

10 sensors

Answer 25

•Chest electrodes (6)
{V1-V6}

•Limb electrodes (4)
{RA & RL}
{LA & LL}

Question 26

Which limb electrode is the ground on an ECG?

Answer 26

RL - Right Leg

Question 27

V1 placement

Answer 27

4th intercostal space @ right margin of sternum.

Question 28

V2 placement

Answer 28

4th intercostal space @ left margin of the sternum.

Question 29

V3 placement

Answer 29

Midway between V2 & V4

Question 30

V4 placement

Answer 30

5th intercostal space @ left midclavicular line

Question 31

V5 placement

Answer 31

Placed midway between V4 & V6

Question 32

V6 placement

Answer 32

5th intercostal space @ the left midaxillary line.