Diagram Flashcards
1
Q
P wave
A
atrial depolarisation
2
Q
length of P wave
A
0.08 - 0.1 seconds
3
Q
what causes P wave
A
AP upstroke throughout atria muscle towards recording electrode
4
Q
Q wave
A
depolarisation of intraventricular septum, moving away from electrode
5
Q
R wave
A
depolarisation of main ventricular mass, moving toward electrode
6
Q
S wave
A
depolarisation of ventricles at base of heart, moving away from electrode
7
Q
T wave
A
ventricular depolarisation, moving away from electrode
8
Q
PR interval
A
AV node delay, 0.12-0.2 secs
9
Q
ST segment
A
maintained ventricular depolarisation (systole)
10
Q
QRS complex
A
ventricular depolaristaion
11
Q
time for QRS complex
A
<0.1 seconds
12
Q
what causes QRS complex
A
AP upstroke throughout ventricular muscle
13
Q
big square
A
0.2 seconds
14
Q
little square
A
0.04 seconds
15
Q
calibration
A
25 mm/sec
