EKG certification Certification EKG Electrode Placement & Lead Systems 3

Question 1

Which precordial lead is positioned at the fourth intercostal space to the right of the sternum?

Accepted Answer

V1

Answer

V1 is placed at the fourth intercostal space at the right sternal border.

Question 2

What do leads V7, V8, and V9 evaluate when added to a standard 12-lead EKG?

Accepted Answer

Posterior wall of the left ventricle

Answer

Leads V7, V8, and V9 are posterior leads used to detect posterior wall myocardial infarction.

Question 3

A technician notices lead III has an inverted P wave and upright QRS. Which electrode misplacement is most likely?

Accepted Answer

Right arm and left arm electrodes are reversed

Answer

Reversal of the right arm and left arm electrodes causes lead III to display characteristics normally seen in other leads, including P-wave inversion.

Question 4

Which group of leads represents the lateral wall of the left ventricle?

Accepted Answer

I, aVL, V5, and V6

Answer

Leads I, aVL, V5, and V6 provide views of the lateral wall of the left ventricle.

Question 5

Where should right-sided chest leads (V3R-V6R) be placed to evaluate a suspected right ventricular infarction?

Accepted Answer

Mirror positions of V3-V6 on the right side of the chest

Answer

Right-sided leads are placed in mirror-image positions of the standard left-sided V3 through V6 on the right chest wall.

EKG certification Practice Test

EKG certification Practice Test

EKG certification Certification EKG Electrode Placement & Lead Systems 3