ECG Basics Flashcards
1
Q
How many electrodes and leads are required
A
10 electrodes
12 leads
placed in mathematically determined positions
2
Q
What is the order of the ECG letters
A
PQRST
3
Q
What is the P wave
A
atrial depolarisation
4
Q
what is QRS complex
A
through bundle of his
ventricular depolarisation
purkinje fibre depolarisation
5
Q
what is the T wave
A
ventricular repolarisation
6
Q
What are units when reading an ECG chart
A
5 larges squares = 1 second
300 LS = 1 minute
7
Q
what is the J point on an ECG?
A
where the S wave joins the ST segment
at rest should be isoelectric line
8
Q
What happens to an ECG following exercise?
A
Deeper Q wave
^ T wave amplitude
Rate-related shortening of QT interval
P and T waves superimpose as successive beats forming an ‘m’ shape
