[22] Pediatric ECG

Question 1

At what age is the LV bigger than the RV?

Answer 1

1 month

Question 2

Describe: T Wave in Neonates

This is true until?

Answer 2

Upright

Inverts after 7 days of age

Question 3

By what age does the T Wave invert?

Answer 3

7 years

Question 4

QRS Axis in Adults

Answer 4

0-90 Degrees

Question 5

QRS Axis of Neonates

Answer 5

+60-160 Degrees

Question 6

QRS Axis by 1 Year of Age

Answer 6

+10-100 Degrees

Question 7

[Heart Rate]

Birth
2 year
4 year
10 years

Answer 7

B: 110-150 BPM
2: 85-125 BPM
4: 75-115 BPM
10 Years: Adult Values

Question 8

In an ECG Lead, where would the tall QRS be in a child?

Answer 8

V4R
V1
V2

This is because the right ventricle is bigger in the child

Question 9

How do you use the Rule of Three Hundred

Answer 9

300
150
100
75
60

Depending on the number of boxes between the Rs

Question 10

Formal Formula for Measurement of Rate in an ECG

Answer 10

1500 / # Small Squares Between R-R

Question 11

Describe: P Wave in Ectopic Rhythm

Answer 11

Inverted P Wave and I in AVL

Question 12

Supraventricular Tachycardia Rate:

Infant
Child

Answer 12

> 220 BPM

> 180 BPM

[BAKA LANG, BAKA LANG LUMABAS SA EXAM]

Question 13

What do you look for first when diagnosing pediatric ECGs?

Answer 13

Age
Rate
Rhythm

Question 14

[Determination of QRS Axis]

II and III have to be how many degrees from AVF?

Answer 14

30 Degrees

Question 15

[Determination of QRS Axis]

AVR and AVL have to be how many degrees from 1?

Answer 15

30 Degrees

Question 16

When is the QRS Positive?

Answer 16

When there is depolarization going towards the lead

Question 17

When is the QRS Negative?

Answer 17

When there is depolarization going away from the lead

Question 18

Perpendicular Leads

Answer 18

I AVF
II AVL
III AVR

Question 19

Determination of Axis

Answer 19

Find Equiphasic Lead
Perpendicular Lead
Determine if Perpendicular is + or -
Axis corresponds to that lead

Question 20

Right Ventricular Hypertrophy in Pediatric ECG

Describe:

R
S
R/S
Q
T

Answer 20

R: Tall R V4R, V1 V2
S: Deep in V5 and V6
R/S: More than 2 
R/S: V6 <1 
Q: QR in V1 or V3R, V4R
T: Upright T in V1 after 3 days (Should be inverted in patients that are not neonates)

Question 21

Left Ventricular Hypertrophy in Pediatric ECG

Describe:

R
S
R/S
Q
T

Answer 21

R: Tall R V6 >25mm
S: SV1 >20mm
R/S: V1 < 0.8 under 1 year
Q: Q >= 5 mm in V5 V6
T: T wave inversion in V5 V6

Question 22

Normal PR Interval

Answer 22

0.12-0.20 second

Question 23

Prolonged PR Interval would be?

This is described as?

Answer 23

> 0.20 second

1st degree AV Block

Question 24

Formula for QT Interval

What is it called?

Answer 24

QTc = QTa / SquareRoot of (RR x 0.04)

Bazett’s Formula

Question 25

Abnormal QT Interval

Answer 25

> 0.44

Question 26

Non-Pathologic Q Waves in Pedia

Answer 26

Less than 2 small squares deep
Less than one small square wide
< 25% of the amplitude of the corresponding R wave

Question 27

T Wave is Positive or Negative between 1 week and adolescence?

Answer 27

Negative

Question 28

What does a U Wave indicate?

Answer 28

Repolarization of Purkinje Fibers

Question 29

When is a U Wave abnormal?

Answer 29

Taller than 2 mm

Suggestive of Hypokalemia