EKG - Quiz 1 Flashcards
1
Q
P wave due to
A
- atrial depolarization
atrial systole
2
Q
atrial repolarization
A
- masked by QRS complex
3
Q
PR interval
A
- time from start of atrial depolarization to start of ventricular depolarization
4
Q
QRS complex
A
- ventricular depolarization
5
Q
QT interval
A
- from start of QRS to end of T wave
6
Q
T wave
A
- ventricular repolarization
7
Q
PR segment
A
- slow propagation through the AV node
8
Q
Q wave results from
A
- normal spread of depolarization in the interventricular septum
9
Q
R wave results from
A
- spread of depolarization through ventricular myocardium
10
Q
S wave represents
A
- later stages of ventricular depolarization
11
Q
ST segment represents
A
- the time when most of the ventricular muscle is depolarized
12
Q
one large horizontal division on the ECG
A
- 0.2 seconds
13
Q
one small horizontal division on the ECG
A
- 0.04 seconds
14
Q
PR interval normal duration
A
- 0.12-0.2 seconds
15
Q
duration of QRS complex
A
- less than 0.1 sec
16
Q
good rule of thumb about time of QT interval
duration
A
- half length of R-R interval
- 0.36-.44
17
Q
how to check for rhythm
A
- check P before each QRS
- check to make sure both II and avF are pointing up
- make sure each is spaced out currently
18
Q
how to calculate QTc
A
QTc = QT/√R-R interval (where R-R interval = 60/HR)
19
Q
angle of lead II
A
60
20
Q
angle of AVF
A
90
21
Q
angle of lead III
A
120
22
Q
angle of lead I
A
0
23
Q
angle of AVL
A
-30
24
Q
angle of AVR
A
-150
25
Q
how to check for axis
A
- look at lead I and aVF
