EKG Flashcards
How much time is one square on an EKG?
0.04 sec
How much time is in 5 squares or one block of an EKG
0.2 sec
What does the EKG strip represent vertically
Voltage
Are the limb leads unipolar or bipolar?
Bipolar (positive and negative pole)
Are the chest leads unipolar or bipolar?
Unipolar
On the EKG strip the chest leads are shown by what letter
V
R arm is always what polarity
Negative
L leg is always what polarity
Positive
Left arm is always what polarity
It switches and can be either negative or positive
If electricity moves towards a positive pole we like to say we get a_____ _______?
Positive Deflection
The QRS below the isoelectric line means that the electricity is moving
away from the positive pole (negative deflection)
Should we have a positive or a negative deflection in lead I
Positive
Should we have a positive or a negative deflection in lead II
Positive
Should we have a positive or a negative deflection in lead III
Positive
Should we have a positive or a negative deflection in AVR
Negative
If AVR has a positive deflection, what does that tell me?
Probably flipped limb leads or
Defect in electrical activity
Where is V1 placed
R side of sternum, 4th intercostal space
Where is V4 placed
L side of sternum 5th intercostal space, mid clavicular line
Should we have a positive or a negative deflection in V1
Negative
Should we have a positive or a negative deflection in V4, V5, V6
Positive
What part of the heart is represented by V1, V2
Septal
What part of the heart is represented by V3, V4
Anterior
What part of the heart is represented by V5, V6
Lateral
