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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

Which leads are for Lateral MI

I, aVL, V5, V6