ECG Interpretation Part 2 (Josh) Flashcards

1
Q

What is an Artifact?

A

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

***patient moving, etc

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2
Q

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

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

A

positive

negative

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3
Q

Where should lead V1 be placed?

A

4th ICS Right sternal border

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4
Q

Which leads can only be positive?

A

Augmented Vector Leads

aVr
aVl
aVf

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5
Q

Which limb leads view the frontal plane of the heart?

A

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

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6
Q

Which leads view the horizontal plane of the heart?

A

the prechordial leads (V1-V6)

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7
Q

What are the two most common leads?

A

Lead II (atrial dysrythmias)

Lead V1 (ventricular ectopy)

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8
Q

What is an R Wave Progression?

A

progression of R Wave from V1 to V6

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

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9
Q

What is a normal Axis?

A

conduction of most electrical activity through the ventricle

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10
Q

Ventricular Axis:

What charge is Normal?

A

Lead I is +

Lead aVf is +

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11
Q

Ventricular Axis:

What charge is Right Axis Deviation?

A

Lead I is -

Lead aVf is +

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12
Q

Ventricular Axis:

What charges is Left Axis Deviation?

A

Lead I is +

Lead aVF is -

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13
Q

Ventricular Axis:

What charge is NW (indeterminate)?

A

Lead I is -

Lead aVf is -

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14
Q

How to remember Ventricular Axis:

A

NRLNW ++ -+ +- –

NRLNW Plus Plus Minus Plus Plus Minus Minus Minus

**remember order is Lead I then Lead aVf

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15
Q

What is Normal Ventricular Axis?

A

conduction going through ventricle

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16
Q

What is Right Ventricular Axis Deviation?

A

conduction deviates to the right of the ventricle

***ditto for Left Ventricular Deviation

17
Q

What is Extreme Right Ventricular Axis Deviation?

A

conduction goes in opposite direction of ventricle

18
Q

What are causes of Left Axis Deviation?

A

MI

Artificial Cardiac Pacing

Emphysema

Hyperkalemia

Injection of contrast into left coronary artery

Left ventricular hypertrophy

19
Q

What are causes of Right Axis Deviation?

A

Normal in kids and tall thin adults

Right Ventricular Hypertrophy

Chronic lung disease

Anterolateral MI

PE

20
Q

What are Causes of Northwest Axis (–)?

A

Emphysema

Hyperkalemia

Lead Transposition

Artificial Cardiac Pacing

Ventricular Tachycardia

21
Q

Slide 41

A

Slide 41