EKG part 1 (S.G) Flashcards
1
Q
SA node bpm
A
60-100
2
Q
AV node bpm
A
40-60
3
Q
Perkinje fibers bpm
A
20-40
4
Q
Action Potential Phases:
-PHASE 0
A
- DEPOLARIZATION
- rapid influx of Na+ into cell
5
Q
Action Potential Phases:
-PHASE 1
A
- Partial REPOLARIZATION
- Na+ channels close
6
Q
Action Potential Phases:
-PHASE 2
A
- PLATEAU
- contraction by K+ & Ca+ into the cell
7
Q
Action Potential Phases:
-PHASE 3
A
- REPOLARIZATION
- K+ leaves the cell
- resting membrane potential (RMP) re-established
8
Q
Action Potential Phases:
-PHASE 4
A
- Resting membrane potential (RMP)
- Na/K pumps restored
9
Q
EKG strips
-strip runs at __ mm/sec
A
25
10
Q
EKG strips
-little box=
A
0.04 sec
11
Q
EKG strips
-big box=
A
0.20 sec
12
Q
PR interval represents
A
Atrial Depolarization
13
Q
PR interval normal time
A
0.12-0.20 sec
14
Q
QRS wave represents
A
Ventricular depolarization
15
Q
QRS wave normal time
A
0.06-0.10 sec
