NCIt definition : A numerical representation of the electrocardiographic vector assessed at maximum
deviation of the QRS complex from the isoelectric baseline, usually reported for the
frontal plane. (CDISC);
Alternative definition : CDISC: A numerical representation of the electrocardiographic vector assessed at maximum
deviation of the QRS complex from the isoelectric baseline, usually reported for the
frontal plane.; ACC/AHA: A numerical representation of the electrocardiographic vector assessed at
maximum deviation of the QRS complex from the isoelectric baseline, usually reported
for the frontal plane;