EKG Components

Question 1

Normal paper speed is..

Answer 1

25 mm/sec

Question 2

Normal gain (height of waveform is)?

Answer 2

10 mm/mv

Question 3

A large box on EKG paper is..

Answer 3

5 mm

Question 4

A small box on EKG paper is..

Answer 4

1 mm

Question 5

What is depolarization?

Answer 5

Contraction

Question 6

What is repolarization?

Answer 6

Relax

Question 7

What node does depolarization and repolarization come from?

Answer 7

Sinoatrial node (sa node)

Question 8

What is the Pwave?

Answer 8

Atrial depolorization and repolarization.

Question 9

What does the QRS complex do?

Answer 9

Represents ventricular depolarization (contraction).

Question 10

What does the Twave do?

Answer 10

Represents ventricular repolarization (relax).

Question 11

What is the PR interval’s normal rate?

Answer 11

12 to .20 secs

Question 12

What is QRS interval’s normal duration?

Answer 12

0.06 to .10 secs

Question 13

Where is V1 placed on the chest?

Answer 13

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

Question 14

Where is V2 placed on the chest?

Answer 14

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

Question 15

Where is V3 placed on the chest?

Answer 15

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

Question 16

Where is V4 placed on the chest?

Answer 16

Fifth ICS, Midclavicular line

Question 17

Where is V5 placed on the chest?

Answer 17

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

Question 18

Where is V6 placed on the chest?

Answer 18

Fifth ICS, at the midaxillary line

Question 19

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

Answer 19

Lead V3