EKG Components Flashcards

1
Q

Normal paper speed is..

A

25 mm/sec

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2
Q

Normal gain (height of waveform is)?

A

10 mm/mv

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3
Q

A large box on EKG paper is..

A

5 mm

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4
Q

A small box on EKG paper is..

A

1 mm

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5
Q

What is depolarization?

A

Contraction

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6
Q

What is repolarization?

A

Relax

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7
Q

What node does depolarization and repolarization come from?

A

Sinoatrial node (sa node)

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8
Q

What is the Pwave?

A

Atrial depolorization and repolarization.

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9
Q

What does the QRS complex do?

A

Represents ventricular depolarization (contraction).

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10
Q

What does the Twave do?

A

Represents ventricular repolarization (relax).

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11
Q

What is the PR interval’s normal rate?

A

12 to .20 secs

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12
Q

What is QRS interval’s normal duration?

A

0.06 to .10 secs

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13
Q

Where is V1 placed on the chest?

A

Fourth intercostal space (ICS), Right side of sternum.

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14
Q

Where is V2 placed on the chest?

A

Fourth ICS, left of sternum, Directly across from V1.

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15
Q

Where is V3 placed on the chest?

A

Midway between V2 and V4 (below V2 and a little to the right)

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16
Q

Where is V4 placed on the chest?

A

Fifth ICS, Midclavicular line

17
Q

Where is V5 placed on the chest?

A

Fifth ICS, midway between V4 and V6, at the anterior axillary line

18
Q

Where is V6 placed on the chest?

A

Fifth ICS, at the midaxillary line

19
Q

When dealing with pediatrics what lead can go on the right to avoid overcrowding?

A

Lead V3