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MS 3 > ECG Part 1 > Flashcards

ECG Part 1 Flashcards

1
Q

What are the power generators of the heart?

A

Sinoatrial node and Atrioventricular node

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2
Q

What is the Sinoatrial node?

A

The primary conductor of the heart/primary pacemaker

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3
Q

What does the SA node contract?

A

Atria

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4
Q

What is the heart sound produced by the SA node?

A

Lub

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5
Q

What is the Atrioventricular node?

A

The substitute for the SA node

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6
Q

Where is the AV node located?

A

Between the atria and ventricles

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7
Q

What heart rate can the AV node produce?

A

40-60 bpm

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8
Q

What heart sound is produce by the AV node?

A

Dub

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9
Q

Trace the electrical conduction of the heart

A
  1. SA node
  2. AV node
  3. Bundle of His
  4. Right and Left Bundle Branches
  5. Purkinje Fibers
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10
Q

What is the function of the Purkinje Fibers?

A

Delivers the current to the rest of the heart

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11
Q

What is the Purkinje Fibers sensitive to?

A

Potassium

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12
Q

What do the slopes in ECG indicate?

A

Contraction of the heart

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13
Q

What does the P wave indicate?

A

SA node, atrial contraction

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14
Q

What does the QRS complex indicate?

A

AV node, ventricular contraction

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15
Q

What is the T wave?

A

Confirms atrial and ventricular contraction, purkinje fibers

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16
Q

What occurs when the patient is hypokalemic?

A

Inverted T wave

17
Q

What occurs when the patient is hyperkalemic?

A

Tall T wave

18
Q

What do the flat lines in the ecg indicate?

A

Relaxation

19
Q

What does the PR interval indicate?

A

Atrial relaxation, current travelling from SA node to AV node

20
Q

What is the duration of the PR interval?

A

0.12-0.20 seconds

21
Q

What does a prolonged PR interval indicate?

A

Heart Block or Carditis

22
Q

What does the ST segment indicate?

A

Ventricular relaxation

23
Q
A

MS 3 (11 decks)

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