The 12 Views of the Heart
45
Just like the limb leads, each precordial lead has its own particular
line of sight and region of the heart that it views best.
V6
V1 V2
V3
V4
V5
Note that the right ventricle lies anteriorly and medially within
the body cavity, and the left ventricle lies posteriorly and laterally.
Lead V1 lies directly over the right ventricle, V2 and V3 over the
interventricular septum, V4 over the apex of the left ventricle, and V5
and V6 over the lateral left ventricle.
Leads V2 through V4 are often referred to as the
anterior leads
, V5
and V6 join I and aVL as
left lateral leads
, and leads aVR and V1 are
the
right ventricular leads
.
Leads
Group
V2, V3, V4
Anterior
I, aVL, V5, V6
Left lateral
II, III, aVF
Inferior
aVR, V1
Right ventricular