NCIt definition : A unipolar electrocardiogram lead site; the electrode is placed on the anterior chest
wall level with lead V4 at the left anterior axillary line. In large animals it is
placed on the sixth ICS on the right side of the thorax along a line parallel to the
level of the point of the shoulder corresponding to the electrical center of the heart
(central terminal).;
Alternative definition : CDISC: A unipolar electrocardiogram lead site; the electrode is placed on the anterior
chest wall level with lead V4 at the left anterior axillary line. In large animals
it is placed on the sixth ICS on the right side of the thorax along a line parallel
to the level of the point of the shoulder corresponding to the electrical center of
the heart (central terminal). (NCI);
Currated CISMeF NLP mapping