ECG Interpretation Flashcards

1
Q

Chest leads on EKG

A

V1 and V2 are going to be down

V4 - transition from down to up…can happen earlier but shoudl NOT happen later

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2
Q

ECG grd paper

A

On block is .4 seconds…5 blocks are .2 seconds

1 block is .1 mV so 5 blocks .5 mV

25mm/sec and 10 mm/mV

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3
Q

How to get rate

A

How many QRS per box? If 1 QRS per 5 boxes, then 300/5

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4
Q

Irregular rate

A

Boxes between each QRS will change

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5
Q

Sinus rhythm

A

P wave before every QRS and QRS after every P

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6
Q

Where to look to determine P waves

A

Lead 2

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7
Q

SA node overdrive

A

Atrial foci - 60-80 BPM
Junctional foci - 40-60 BPM
Ventricular foci - 20-40 BPM

Basically, if SA node stopped working, these cells would pick up at these rates

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8
Q

William Morrow

A

V1 - W, V6- M…LBBB

V1 - M, V6 - W…RBBB

V1 bunny ears - RBBB

V5/V6 - Nose

Use V1/V6

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9
Q

PR interval and what it can be used to ID

A

Use to ID AV block (lead 2)

If prolonged but sinus, then primary

If prolonged but non-sinus then secondary

If not associated with QRS, then tertiary

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10
Q

QTC

A

T wave should hit less than halfway before the next QRS wave

Lead 2?

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11
Q

Which way does vector point in infarction

A

Away from the infarction

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12
Q

How to determine dquarant

A

Look at 1 and AVF

If 1+, then must be on pt left

If AVF positive, then must be on pt lower 1/2

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13
Q

LV hypertrophy findings

A

Tall QRS complex

Inverted T wave with long and gradual and then rapid portions

SV1 + RV5 or RV6>35 mm

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14
Q

ISchemia

A

Symmetrically inverted T wave

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15
Q

ST depression

A

Subendocardial infarction

Positive stress test

Digitalis

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16
Q

INjury

A

Means acute or recent

ST elevation

17
Q

Necrosis

A

Q wave…diagnostic for infarction

Must be 1/3 of total QRS complex

18
Q

Inferior
Lateral
Anterior
Septal leads

Signs of MI

A

Lateral - I and AVL, V5, V6
Ant - V1-V4
inferior - II, III, AVF
Septal - V1/V2