Lead by number
How many leads in a 12 lead EKG
12
How many leads are bipolar?
3
How many leads are unipolar?
9
Where is the "ground" located?
Right leg
Name the locations used to place the 4 limb or extremity electrodes.
R wrist/arm/shoulder
L wrist/arm/should
R ankle/leg
L ankle/leg
How many stickers or electrodes are needed for a 12 lead EKG?
10
Name the bipolar leads.
Lead I
Lead II
Lead III
The 9 unipolar leads can fall into two categories.
One has 3 leads
And one has 6 leads
Name the two categories
Augmented leads
and
Precordial leads
This extremity is unique because in some leads it has a positive charge and in some leads it has a negative charge.
The left upper extremity (wrist/arm/shoulder)
What is an intercostal space?
How many leads are bipolar?
3
Explain what a bipolar lead means. What makes it bipolar?
There are two different electrodes one + and one -
A bipolar lead measures the electrical difference between two electrodes
Name the unipolar precordial leads
V1
V2
V3
V4
V5
V6
If electrodes are placed correctly the tallest QRS should be located in which lead?
Lead II
Place V1
4th intercostal space to the (patient's) right sternal border
How many leads are unipolar?
9
If you notice a problem in lead I, II, or III on your EKG which electrodes would you want to troubleshoot.
Limbs
Name the unipolar augmented leads.
aVR
aVF
aVL
What could it mean if the tallest lead is not the one that it should be?
Possible lead misplacement
Place V6
5th intercostal space midaxillary line
How many precordial leads are on a 12 lead EKG?
6
These three bipolar lead's make up this.
Hint: In contains the name of the person credited for creating the first (and primitive) EKG.
Einthoven's Triangle
Explain the difference between BIpolar and UNIpolar leads
Bipolar = + and -
Unipolar = +
State Einthoven's law as it relates to the QRS complex.
Lead I + Lead III = Lead II
Place V4
5th intercostal space, midclavicular line