EKG Electrode Placement & Lead Systems Flashcards
6 cards from real EKG certification Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 EKG Electrode Placement & Lead Systems flashcards as text
Which precordial lead is positioned at the fourth intercostal space to the right of the sternum?
Answer: V1
V1 is placed at the fourth intercostal space at the right sternal border.
What do leads V7, V8, and V9 evaluate when added to a standard 12-lead EKG?
Answer: Posterior wall of the left ventricle
Leads V7, V8, and V9 are posterior leads used to detect posterior wall myocardial infarction.
A technician notices lead III has an inverted P wave and upright QRS. Which electrode misplacement is most likely?
Answer: Right arm and left arm electrodes are reversed
Reversal of the right arm and left arm electrodes causes lead III to display characteristics normally seen in other leads, including P-wave inversion.
Which group of leads represents the lateral wall of the left ventricle?
Answer: I, aVL, V5, and V6
Leads I, aVL, V5, and V6 provide views of the lateral wall of the left ventricle.
Where should right-sided chest leads (V3R-V6R) be placed to evaluate a suspected right ventricular infarction?
Answer: Mirror positions of V3-V6 on the right side of the chest
Right-sided leads are placed in mirror-image positions of the standard left-sided V3 through V6 on the right chest wall.
What is the primary purpose of the right leg (RL) electrode in a standard 12-lead EKG?
Answer: It serves as a ground reference to reduce electrical interference
The right leg electrode functions as an electrical ground to minimize noise and artifact on the tracing.