ECG Tutorial   
line11.gif (1202 bytes)

 

Introduction
       Electrode Placement
                 Views
Anatomy
Heart Rate
PR Interval
QRS Interval
QT Interval

Home

Electrode placement for complete 12 lead ECG
Lead 1: LA - RA:

Left foreleg (left arm) electrode (+) placed just below the point of the elbow on the back of the left forearm - right foreleg (right arm) electrode (-) placed just below the point of the elbow on the back of the right forearm.
Lead II: LL - LA

Left hindleg (left leg) electrode (+) placed on the loose skin at the left stifle in the region of the patella - left foreleg (left arm) electrode (-) placed just below the point of the elbow on the back of the left forearm.
Lead III: LL - RA:

Left hindleg (left leg) electrode (+) placed on the loose skin at the left stifle in the region of the patella - right foreleg (right arm) electrode (-) placed just below the point of the elbow on the back of the right forearm.
aVR: RA - CT:

Right foreleg (right arm) electrode (+) placed just below the point of the elbow on the back of the right forearm - the electrical center of the heart or central terminal x 3/2; left foreleg and left rear leg (-).
aVL: LA - CT:

Left foreleg (left arm) electrode (+) placed just below the point of the elbow on the back of the left forearm - the electrical center of the heart or central terminal x 3/2; right foreleg and left rear leg (-).
aVF: LL - CT:

Left hindleg (left leg) electrode (+) placed on the loose skin at the left stifle in the region of the patella - the electrical center of the heart or central terminal x 3/2; right foreleg and left foreleg (-).
CV6LL: V1 - CT:

V1 electrode (+) placed in the 6th intercostal space on the left side of the thorax along a line parallel to the level of the point of the elbow - the electrical center of the heart (central terminal).
CV6LU: V2 - CT:

V2 electrode (+) placed in the 6th intercostal space on the left side of the thorax along a line parallel to the level of the point of the shoulder - the electrical center of the heart (central terminal).
V10: V3 - CT:

V3 electrode (+) placed over the dorsal thoracic spine of T7 at the withers - electrical center of the heart. The dorsal spine of T7 is located on a line encircling the chest in the 6th intercostal space (central terminal).
CV6RL: V4 - CT:

V4 electrode (+) placed in the 6th intercostal space on the right side of the thorax along a line parallel to the level of the point of the elbow - the electrical center of the heart (central terminal).

CV6RU:V5 - CT:

V5 electrode (+) placed in the 6th intercostal space on the right side of the thorax along a line parallel to the level of the point of the shoulder - the electrical center of the heart (central terminal).

Base-apex:LA-RA

Left foreleg (left arm) electrode (+) placed in the 6th intercostal space on the left side of the thorax along a line parallel to the level of the point of the elbow - right foreleg (right arm) electrode (+) placed on the top of the right scapular spine or over the right jugular furrow

Back to top


Copyright 1999 University of Pennsylvania School of Veterinary Medicine
Faculty Sponsor: Dr. Virginia Reef
Student: Jeff Horst  V'02
Date this page was last updated: May 20, 2002