Objective: Precordial ECGs reveal significant intrasubject variability due to the inexact employment of the recommended V 1-V 6 chest landmarks. Also, as per the Einthoven law, the six limb leads ...

Pain or discomfort in the chest (front or back) The chest includes from the top to the bottom of the rib cage Chest pains in children lasting for a few minutes are usually harmless. The pain can be ...