Electrocardiography Flashcards
1
Q
What does the P wave represents?
A
- Atrial depolarization
1
Q
What are the different waves orf ECG?
A
- P wave
- QRS complex
- T wave
2
Q
What does the QRS complex represents?
A
- Ventricular depolarization
3
Q
What does the T wave represent?
A
- Ventricular repolarization
4
Q
What do ECGs assess?
A
- The rate and regularity of heartbeats
- The size and position of the chambers
- The presence of any damage to the heart
5
Q
What are ECGs helpful for?
A
- Heart conditions
- Anaesthesia
- Toxaemia
- Electrolyte disturbances
6
Q
Why is electrode conductive gel needed?
A
- Need good electrical contact with skin
7
Q
Where does the red cable connect to?
A
- Right forelimb
8
Q
Where does the yellow cable connect to?
A
- Left forelimb
9
Q
Where does the black cable connect to?
A
- Right Hindlimb
10
Q
Where does the green cable connect to?
A
- Left Hindlimb
11
Q
What causes interference in a ECG?
A
- Electrical interference
- Patient movement
- Poor electrode attachment
12
Q
What is sinus arrythmia?
A
- Heart rate increases in expiration and slows on expiration
- Vagal increases during inspiration and disappears during exercise
- Normal in medium and large dogs
13
Q
What is a AV block?
A
- No QRS complex after P wave
14
Q
What is 1st degree AV block?
A
- Prolonged PR interval
15
Q
What is 2nd degree AV block?
A
- Occasional P wave which doesn’t have a QRS
16
Q
What is a 3rd degree AV block?
A
- All P waves with only occasional QRS escape complex
