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 ...

Here is some care advice that should help. To help with the pain, give an acetaminophen product (such as Tylenol). Another choice is an ibuprofen product (such as Advil). Use as needed. Continue this ...