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CVR3
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The PR line symbolizes this
AV node delay
A positive wave represents this
Depolarization towards
Repolarization away
A negative wave represents this
Repolarization towards
Depolarization away
How many electrodes do you need to record ECG?
2
active electrode
reference electrode
V1
Right 4th intercostal
Sternum
V2
Left 4th intercostal
sternum
V3
between V2 and V4
V4
Left 5th intercostal
midclavicular
V5
left 5th intercostal
anterior axillary
V6
left 5th intercostal
mid-axillary
VL
junction of left arm and trunk
VR
junction of right arm and trunk
VF
junction of left leg and trunk
This lead goes from right to left arm
Lead I
left arm active
This lead goes from right arm to left leg
Lead II
active leg
This lead goes from left arm to left leg
Lead III
active leg
What is einthoven’s law?
lead
2
=
lead
1
+
lead
3
P wave represents this
Atrial depolarization
QRS complex represents this
Ventricular depolarization
T wave represents this
Ventricular repolarization
Long P-R interval can indicate this
1st degree heart block
How long is a normal PR interval?
0.2 seconds
How long is a normal QRS complex?
0.1 sec
Net
direction and magnitude
of current movement during ventricular depolarization
Mean cardiac axis
Author
Bobopudge
ID
65821
Card Set
CVR3
Description
ECG
Updated
2011-03-24T14:56:43Z
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