2.2 Flashcards
1
Q
P wave represents
A
atrium depolarization
2
Q
QRS complex represents
A
ventricular depolarization
3
Q
where can we find atrial repolarization?
A
hidden inside the QRS complex
4
Q
T wave represents
A
ventricular repolarization
5
Q
duration of PQ (or PR) interval?
A
0.12-0.2 sec
6
Q
duration of QRS complex?
A
0.06-0.1 sec
7
Q
duration of P wave?
A
0.12 sec
8
Q
amplitude of ST?
A
0.1-0.2 mV
9
Q
amplitude of R and T waves in lead II
A
R > 5 mm
T < 5 mm
10
Q
what do ECG measures?
how?
A
measure changes in potential (cardiac myocytes)
uses surface electrodes
11
Q
Einthoven detects Bipolar/Unipolar?
A
Bipolar electrodes
12
Q
what is the Einthoven rule?
A
potential difference in lead II is the sum of potential difference in I+III
13
Q
lead II is btw
A
RA (–) to LL (++)
