Preferred Label : 12 Lead Placement Standard;
NCIt synonyms : 12 Lead Placement Standard;
NCIt related terms : 12 LEAD STANDARD;
NCIt definition : An electrocardiogram (ECG) lead placement whereby 12 leads are recorded, with each
lead representing an electrical view of the heart. The six leads recorded in the frontal
plane are derived from the placement of 3 electrodes (RA or Right Arm, LA, or Left
Arm, and LL or Left Leg). These bipolar frontal leads form the basis of Einthoven's
triangle, and are represented by leads I, II, and III. Three other derived (or augmented)
bipolar frontal vectors are also recorded on a standard 12-lead EKG, aVR, aVF, and
aVL. 6 unipolar leads, corresponding to V1 - V6 measure the electrical activity in
the horizontal plane. The placement for the V leads is as follows: V1: right 4th intercostal
space,V2: left 4th intercostal space, V3: halfway between V2 and V4, V4: left 5th
intercostal space, mid-clavicular line, V5: horizontal to V4, anterior axillary line,
V6: horizontal to V5, mid-axillary line.;
Alternative definition : CDISC: An electrocardiogram (ECG) lead placement whereby 12 leads are recorded, with
each lead representing an electrical view of the heart. The six leads recorded in
the frontal plane are derived from the placement of 3 electrodes (RA or Right Arm,
LA, or Left Arm, and LL or Left Leg). These bipolar frontal leads form the basis of
Einthoven's triangle, and are represented by leads I, II, and III. Three other derived
(or augmented) bipolar frontal vectors are also recorded on a standard 12-lead EKG,
aVR, aVF, and aVL. 6 unipolar leads, corresponding to V1 - V6 measure the electrical
activity in the horizontal plane. The placement for the V leads is as follows: V1:
right 4th intercostal space,V2: left 4th intercostal space, V3: halfway between V2
and V4, V4: left 5th intercostal space, mid-clavicular line, V5: horizontal to V4,
anterior axillary line, V6: horizontal to V5, mid-axillary line. (NCI);
Origin ID : C71102;
UMLS CUI : C2346533;
Semantic type(s)
- concept_is_in_subset
