<prompt> According to Einthovens law:1231322311230  <response>: The sum of the voltages in lead 13 equals the voltage in lead 2, mathematically this principle is called as Einthoven law.Einthovens Law:Einthovens law states that if the ECGs are recorded simultaneously with the three limb leads, the sum of the potentials recorded in leads I and III will equal the potential in lead II. 