ECG ECG Lead Placement and Equipment

Question 1

Where is the V1 precordial lead electrode placed?

Accepted Answer

4th intercostal space, right sternal border

Answer

V1 is placed at the 4th intercostal space along the right sternal border.

Question 2

Which color is the right arm (RA) lead wire in standard US ECG color coding?

Accepted Answer

White

Answer

In the US AHA color coding system, the right arm lead is white.

Question 3

The V4 precordial lead is placed at which location?

Accepted Answer

5th intercostal space, midclavicular line

Answer

V4 is placed at the 5th intercostal space at the left midclavicular line.

Question 4

What is the standard paper speed used for ECG recordings in the US?

Accepted Answer

25 mm/sec

Answer

The standard ECG paper speed in the US is 25 mm/sec.

Question 5

Which lead is considered the ground lead in a standard 12-lead ECG setup?

Accepted Answer

Right leg (RL)

Answer

The right leg lead serves as the electrical ground in a standard 12-lead ECG.

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