ECG Interpretation Part 2 (Josh) Flashcards Preview

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Flashcards in ECG Interpretation Part 2 (Josh) Deck (21):
1

What is an Artifact?

markings on ECG tracing that are NOT a product of heart's electrical activity

***patient moving, etc

2

If electricity flows towards the positive electrode, the deflection will be ---

If electricity flows towards the negative electrode, the deflection will be ---

positive

negative

3

Where should lead V1 be placed?

4th ICS Right sternal border

4

Which leads can only be positive?

Augmented Vector Leads

aVr
aVl
aVf

5

Which limb leads view the frontal plane of the heart?

I, II, III, aVr, aVl, and aVf

6

Which leads view the horizontal plane of the heart?

the prechordial leads (V1-V6)

7

What are the two most common leads?

Lead II (atrial dysrythmias)

Lead V1 (ventricular ectopy)

8

What is an R Wave Progression?

progression of R Wave from V1 to V6

***starts negative on V1 and progresses until completely positive on V6

9

What is a normal Axis?

conduction of most electrical activity through the ventricle

10

Ventricular Axis:

What charge is Normal?

Lead I is +

Lead aVf is +

11

Ventricular Axis:

What charge is Right Axis Deviation?

Lead I is -

Lead aVf is +

12

Ventricular Axis:

What charges is Left Axis Deviation?

Lead I is +

Lead aVF is -

13

Ventricular Axis:

What charge is NW (indeterminate)?

Lead I is -

Lead aVf is -

14

How to remember Ventricular Axis:

NRLNW ++ -+ +- --

NRLNW Plus Plus Minus Plus Plus Minus Minus Minus

****remember order is Lead I then Lead aVf

15

What is Normal Ventricular Axis?

conduction going through ventricle

16

What is Right Ventricular Axis Deviation?

conduction deviates to the right of the ventricle

***ditto for Left Ventricular Deviation

17

What is Extreme Right Ventricular Axis Deviation?

conduction goes in opposite direction of ventricle

18

What are causes of Left Axis Deviation?

MI

Artificial Cardiac Pacing

Emphysema

Hyperkalemia

Injection of contrast into left coronary artery

Left ventricular hypertrophy

19

What are causes of Right Axis Deviation?

Normal in kids and tall thin adults

Right Ventricular Hypertrophy

Chronic lung disease

Anterolateral MI

PE

20

What are Causes of Northwest Axis (--)?

Emphysema

Hyperkalemia

Lead Transposition

Artificial Cardiac Pacing

Ventricular Tachycardia

21

Slide 41

Slide 41