Patent ID: 8744808

Claim:
An apparatus comprising: a first electrode to be coupled to a first portion of a body of a subject, the first electrode comprising: a first contact to gather a first signal from the first portion of the body; and a second contact to gather a second signal from the first portion of the body; a second electrode to be coupled to a second portion of the body of the subject, the second electrode comprising: a third contact to gather a third signal from the second portion of the body; and a fourth contact to gather a fourth signal from the second portion of the body; and a processor communicatively coupled to the first electrode and the second electrode to: separately process the first signal, the second signal, the third signal and the fourth signal; apply a first weighting factor to the first signal to produce a first weighted signal, a second weighting factor to the second signal to produce a second weighted signal, a third weighting factor to the third signal to produce a third weighted signal and a fourth weighting factor to the fourth signal to produce a fourth weighted signal; combine the first weighted signal and the second weighted signal to produce a first virtual electrode signal; combine the third weighted signal and the fourth weighted signal to produce a second virtual electrode signal; and analyze the first virtual electrode signal and the second virtual electrode signal.