Flashcards in 12 Lead EKG Deck (23):
0
Who invented the Electrocardiogram?
Einthoven
1
What polarity is the right arm for leads?
Always negative
2
What polarity is the left leg for limb leads?
Always Positive
3
Which limb lead can be either positive or negative polarity?
Left arm
4
What are he three different types of ECG leads?
Bipolar, unipolar, precordial
5
Which limb leads are bipolar?
I, II, and III
6
What is the normal polarity of cardiac cells?
Polarized
7
What occurs when cardiac cell depolarization occurs?
Sodium enters into the cell and Potassium exits from the cell
8
What pathways connect the SA node to the AV node?
Internodal pathways
9
In a 12 lead how should a QRS complex appear on aVR?
Negative
10
What are the first four things you look at for a 12 lead?
First impression
Rate
Rhythm
Axis
11
What are things to consider with wide QRS?
Ventricular Focus
Paced Rhythm
Right or left block
12
How do you determine right or left branch blocks?
Wide
negative deflection (Left branch)
positive deflection (Right branch)
13
How to determine axis in 12 lead?
Look at lead 1 and aVF and determine whether most of the rhythm occurs above or below the isoelectric line
14
How should ST segments appear?
at the isoelectric line
15
When does ST segment elevation occur
When there is transmural myocardial injury
16
ST segment depression indicates what?
Ischemia
17
What is Transmural MI
Full covering block
18
Define STEMI
1 mm ST segment elevation in 2 or more contiguous leads
19
Which leads are for interior MI
II, III, aVF
20
Which leads are for Septal MI
V1, V2
21
Which leads are for anterior MI
V3, V4
22