CVR3

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

65821

Card Set

CVR3

Description

ECG

Updated

2011-03-24T14:56:43Z

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