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Year 3 - History and Examination > ECG > Flashcards

ECG Flashcards

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1
Q

What limb lead represents activity in the right atrium?

A

aVR

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2
Q

What is the inferior surface of the heart comprised of?

And what limb leads show activity in this area?

A

Right ventricle

leads III and aVF

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3
Q

What makes up the left lateral surface of the heart ?

And what limb leads show activity in this area?

A

Left lateral surface = left atrium + left ventricle

leads I , II and aVL

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4
Q

Which limb leads have a postive P wave?

A

All apart from aVR have a positive P wave:

- leads i, II, II, aVL, aVF = positive P wave

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5
Q

Which chest leads represent the SEPTUM?

A

V1 and V2

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6
Q

Which chest leads represent the the anterior wall of the left ventricle?

A

V3 and V4

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7
Q

Which of the chest leads represent the Anterior and lateral wall of the left ventricle?

A

V5 and V6

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8
Q

All together which leads (chest and limb) show activity in the right ventricle?

A

Chest:
V1 and V2

Limb:
Leads III and aVF

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9
Q

what surface is the right ventricle?

A

inferior surface

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10
Q

What surface is the left atrium and left ventricle?

A

left lateral surface

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11
Q

What could be the cause of Left axis deviation?

A
  • Left ventricular hypertrophy

- Inferior MI (MI of the right ventricle)

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12
Q

occlusion of what artery could cause an inferior MI (leading to left axis deviation)?

A

right coronary artery occlusion can cause an inferior MI (right ventricular MI) leading to left axis deviation

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13
Q

What would be the sign of left axis deviation on an ECG?

A

R waves in leads I and II point away from each other (leaving each other for LAD)

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14
Q

What would be the sign of right axis deviation on an ECG?

A

R waves in leads I and II point towards each other (reaching for each other because they are RAD)

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15
Q

What are the causes of Right axis deviation?

A
  • right ventricular hypertrophy
  • Lateral MI (MI of left atrium / left ventricle)
  • pulmonary embolus
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16
Q

occlusion of what artery could cause a lateral MI (leading to RAD)?

A

Lateral MI could be:

  • anterolateral MI due to Left descending coronary artery occlusion
  • inferior lateral MI due to left circumflex artery occlusion
  • isolated lateral MI due to small artery occlusion.
17
Q

What signs on an ECG could indicate a lateral MI?

A

Lateral MI = MI affecting left side

look at leads I, aVL, V5 and V6 for ST elevation

Year 3 - History and Examination (22 decks)

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