12 Lead EKG Question and answers rated A+ 2026/2027

12 Lead EKG Question and answers
rated A+ 2026/2027
12-lead EKG provides spatial information about the heart's electrical activity in 3 approx. orthogonal
directions: - correct answer 1. right --> left

2. superior --> inferior

3. anterior --> posterior



BIpolar limb leads:

UNIpolar limb leads:

Unipolar chest leads: - correct answer Lead I, II, III; VERTICAL view

aVR, aVL, aVF; VERTICAL view

V1, V2, V3, V4, V5, V6; HORIZONAL view



Einthoven's Triangle - correct answer the 6 frontal plane leads = negative & positive orientation (prof.
said to just know what it was called)



There are 10 electrodes in a 12-lead EKG: - correct answer A) The SIX LIMB LEADS come from FOUR
LIMB ELECTRODES on RA, LA, RF, LF

B) The SIX PRECORDIAL LEADS come from SIX CHEST electrodes on a horizontal plane in 4th and 5th ICS



Anterior leads? - correct answer V2

V3

V4

PER THALER!

, Inferior Leads?

-view from left leg (+), inferior wall of left ventricle - correct answer II

III

aVF



left-lateral leads? - correct answer I

aVL

V5

V6



right-sided lead - correct answer aVR

V1



V1 location? - correct answer 4th ICS to the RIGHT of the sternum



V2 location? - correct answer 4th ICS to the LEFT of the sternum



V3 location? - correct answer between V2 and V4



V4 location? - correct answer 5th ICS @ midclavicular line



V5 location? - correct answer 5th ICS @ anterior axillary line



V6 location? - correct answer 5th ICS @ midaxillary line