ECG Basics

Question 1

Nommez séquence pour lire ECG ?

Answer 1

1. Rythme
2. Heart rate
3. P Wave
4. Interval PR
5. QRS

Question 2

C’est quoi les valeurs ?

Answer 2

Question 3

Comment calculer rythme ?

Answer 3

Examine the R-R intervals on EK strip
Determine if regular (small variations of up to 10% are considered equal), is it regularly irregular ?

Question 4

Comment calculer heart rate?

Answer 4

First method : Count the number of QRS complexes over a 6-second interval (30 cubes) x 10
Second method : Count the number of small boxes for a typical R-R interval. Divide this number into 1500 to determine heart rate.

Question 5

What does P wave represent ?

Answer 5

atrial depolarization

Question 6

What’s normal value P Wave ?

Answer 6

The amplitude is normally 0.05 to 0.25mV (0.5 to 2.5 small boxes).
Normal duration is 0.06-0.12 seconds (1.5 to 2.75 small boxes).

Question 7

What does PR interval represent ?

Answer 7

AV conduction time, from the start of atrial depolarization to the start of ventricular depolarization (the QRS complex).

Question 8

What’s normal value PR interval ?

Answer 8

0.12 to 0.20 seconds (3 to 5 small boxes) in adults

Question 9

What does QRS represent ?

Answer 9

ventricular depolarization

Question 10

What’s normal value QRS ?

Answer 10

0.06 to 0.12 seconds (1.5 to 3 boxes).

Question 11

Describe : T Wave

Answer 11

Repolarization of ventricles

Question 12

Normal value QT interval

Answer 12

0.36 to 0.44 seconds (9-11 boxes)